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jmort
02-21-2019, 10:16 AM
There has been some bit of discussion and some bit of action I believe on this.
I love the .458 SOCOM as the only Plug and Play AR-15 heavy with no mag mods and bullets up to 600 grains.
As points of reference, here is the Barnes, but I see no need for a boat-tail
Otherwise nice looking bullet

236476

And Missouri Bullets is selling a 410 grain dedicated cast .458 SOCOM "sub-sonic thumper," their words, which would be real nice with a hollow-point , and a gas check. But a lighter super-sonic bullet would be nice, or two versions one streched out for sub-sonic.

236477

Hope this can get going and garner some interest. Could also work in a 45-70.
Thoughts???

bluejay75
02-21-2019, 11:08 AM
The Barnes boolit posted is a much easier clone than the 452 version. Lose the tip, move grooves down lose the boat tail and I think its a great start. If you have some or one...lets get it sent to lar45 to see what the lead version looks like. Standby.

hicard
02-21-2019, 04:51 PM
Yah, add lube grooves, HP's and a gas check to that Missouri bullet and you might have something. Maybe 325-335 grs.

jmort
02-22-2019, 09:34 AM
The Barnes boolit posted is a much easier clone than the 452 version. Lose the tip, move grooves down lose the boat tail and I think its a great start. If you have some or one...lets get it sent to lar45 to see what the lead version looks like. Standby.

I will order a box today.

thraxx
02-22-2019, 09:54 AM
The Barnes boolit posted is a much easier clone than the 452 version. Lose the tip, move grooves down lose the boat tail and I think its a great start. If you have some or one...lets get it sent to lar45 to see what the lead version looks like. Standby.

I'm pretty sure I have a box at home. PM me where to send it.

bluejay75
02-22-2019, 10:14 AM
I'm pretty sure I have a box at home. PM me where to send it.

Pm to lar45 for address please.

jmort
02-22-2019, 10:39 AM
I'm pretty sure I have a box at home. PM me where to send it.

Bless you for doing this.
Here is his member contact info
http://castboolits.gunloads.com/member.php?15-lar45

tradbear55
02-22-2019, 12:29 PM
Will this bullet have a crimp ring. I would love to get this for my 45-70, but would prefer a crimp ring.

jmort
02-22-2019, 12:34 PM
Since this discussion is ongoing we shall see. A crimp groove would be beneficial in a tube magazine. Once a design proposal gets up for discussion, everything can be hashed out.

Smoke4320
02-22-2019, 12:59 PM
458 socom does not require a mag modification or special mag ..
any quality 223/5.56 AR15 mag should work

dragon813gt
02-22-2019, 08:46 PM
The round was designed to work w/ standard GI magazines. Proprietary mags are made for more reliable feeding. But they aren’t needed. Pmags may need some modifications for reliable feeding. But they will also work unmodified w/ the right bullet. You don’t need proprietary mags w/ the 458 Socom.

Echd
02-24-2019, 09:13 PM
With some GI mags it can help to bend the feed lips out just a touch. Not all of them, and it doesn't seem to be any rhyme or reason as to which ones. But it's easy to do and you do so little or it the mags still work fine with 223 afterwards in my experience.

pmer
02-24-2019, 10:03 PM
236775

I got these 405 grain Marlin boolits to feed in my SOCOM by grinding the magazine lips back. I'm not sure why but I think its because the cartridge pops up free of the mag earlier in the forward movement of the BCG.

.325 meplat, the upper mag is the modified one.

After working with a smooth sided 305 grain with no check, a grooved and checked boolit doesn't sound to bad.

thraxx
02-25-2019, 10:52 PM
I've got Barnes .458 - 300gr Tac-TX BT bullets, this is what we're basing the design on, correct?

jmort
02-26-2019, 01:01 AM
I've got Barnes .458 - 300gr Tac-TX BT bullets, this is what we're basing the design on, correct?

Yes
Could you send a couple to LAR45. Please send him PM for him mailing address.
http://castboolits.gunloads.com/member.php?15-lar45

jmort
02-26-2019, 01:03 AM
I've got Barnes .458 - 300gr Tac-TX BT bullets, this is what we're basing the design on, correct?

This is the bullet

Caliber 458 Socom
Type TTSX BT
Weight 300
Diameter .458
S.D. 0.204
B.C. 0.236
Twist Rate Standard
Length 1.235
Box QTY 50
Catalog # 30642


Yes
Could you send a couple to LAR45. Please send him PM for him mailing address.
http://castboolits.gunloads.com/member.php?15-lar45

thraxx
02-26-2019, 10:27 AM
Thats the one. :)

I sent LAR45 a PM last night.

jmort
02-26-2019, 10:46 AM
Bless you

bluejay75
02-26-2019, 12:47 PM
Now what would be nice is if someone could make silicone tips to glue in for them to the specs for one of the pins that are offered.

thraxx
02-26-2019, 01:57 PM
...or a muti-cavity mold for making your own? :kidding:

hicard
02-26-2019, 10:34 PM
Looks good but, I would jump all over a Gould 330 GR copy with GC design.

lar45
02-27-2019, 08:31 PM
Hi guys, The bullet hasn't arrived yet, should be here soon I would suspect.
I've been trying to find a print of the chamber or reamer, but can't seem to find one anywhere.
Does anyone know what the lead and throat area looks like?

I did find one reference to the ball seat being .185" long and tapers from .4595 to .4520"
Another question, are you able to shoot longer cast bullets with the base and gas check below the neck?
Also what is the real max loaded length? I've found 2.015", 2.260", and 2.310"

Thanks
Glenn.

lar45
03-05-2019, 06:03 PM
Hi guys, the bullets showed up yesterday, and this is where I'm at.
It looks like it will be around 425 grains at 1.20" long without the plastic tip.
The meplat on the Barnes bullet without the plastic tip is .260"
The center of the radiused meplat is .261"
I put 2 crimp grooves on for different seating depths, this can always be moved around if needed.

237436

Let me know what you like or not.
Glenn.

jmort
03-05-2019, 06:14 PM
Looks real good to me. If there can be some certainty about the exact perfect OAL then a single crimp groove would be best, but absent that certainty, two crimp grooves makes sense.
I really like this.
Thank you for the quick attention.
Look forward to more sophisticated comments from others.

thraxx
03-05-2019, 10:41 PM
I was thinking this was going to be a 300-350gr bullet...

lar45
03-05-2019, 11:48 PM
I can chop some out of the middle to get the weight down.

jmort
03-06-2019, 12:30 AM
Here is some load data to consider:


.458 Socom (Barnes Data 2012)

Warning! Notes: COAL: 2.240"; case: Starline; case trim length: 1.565"; primer: Rem 2 1/2; barrel length: 16"; twist rate: 1:9"
Be Alert: Publisher cannot be responsible for errors in published load data.
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)
300 Barnes TAC-TX Hodgdon Lil'Gun 24.5 1601
Remarks: starting load; most accurate load
300 Barnes TAC-TX Hodgdon Lil'Gun 26.5 1704
Remarks: maximum load; most accurate load
300 Barnes TAC-TX Winchester W-296 27.0 1549
Remarks: starting load
300 Barnes TAC-TX Winchester W-296 29.0 1719
Remarks: maximum load
300 Barnes TAC-TX IMR IMR-4227 28.0 1582
Remarks: starting load
300 Barnes TAC-TX IMR IMR-4227 30.0 1669
Remarks: maximum load
300 Barnes TAC-TX Accurate AAC-1680 33.0 1662
Remarks: starting load
300 Barnes TAC-TX Accurate AAC-1680 35.0 1747
Remarks: maximum load
300 Barnes TAC-TX Alliant RL-7 35.0 1602
Remarks: starting load
300 Barnes TAC-TX Alliant RL-7 37.0 1691
Remarks: maximum load
330 Barnes Banded Solid Hodgdon Lil'Gun 26.5 1599
Remarks: starting load
330 Barnes Banded Solid Hodgdon Lil'Gun 28.5 1699
Remarks: maximum load
330 Barnes Banded Solid Winchester W-296 29.5 1552
Remarks: starting load
330 Barnes Banded Solid Winchester W-296 31.5 1708
Remarks: maximum load
330 Barnes Banded Solid IMR IMR-4227 32.0 1598
Remarks: starting load; most accurate load
330 Barnes Banded Solid IMR IMR-4227 34.0 1739
Remarks: maximum load; most accurate load
330 Barnes Banded Solid Accurate AAC-1680 38.0 1678
Remarks: starting load
330 Barnes Banded Solid Accurate AAC-1680 40.0 1811
Remarks: maximum load
330 Barnes Banded Solid Alliant RL-7 41.0 1685
Remarks: starting load
330 Barnes Banded Solid Alliant RL-7 43.0 1783
Remarks: maximum load


.458 SOCOM

Warning! Notes: Tromix .458 SOCOM Monster, 16.25-inch barrel. Accuracy is the average of four five-shot groups fired from a sandbag benchrest at 100 yards. Velocity is the average of 10 rounds measured 15 feet from the gun's muzzle. All handloads used Starline cases and CCI 350 primers. All load data should be used with caution. Always start with reduced loads first and make sure they are safe in each of your guns before proceeding to the high test loads listed. (Source: Teppo Jutsu)
Be Alert: Publisher cannot be responsible for errors in published load data.
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)
300 Barnes X-Bullet Hodgdon Lil'Gun 33.0 1901
Remarks: OAL (inches): 2.26; 100-yard accuracy (inches): 1.75
300 Remington JHP Hodgdon H-110 35.0 1631
Remarks: OAL (inches): 2.02; 100-yard accuracy (inches): 2.00
300 Remington JHP Hodgdon Lil'Gun 35.0 2012
Remarks: OAL (inches): 2.02; 100-yard accuracy (inches): 1.60
405 Remington JFP Hodgdon Lil'Gun 29.0 1607
Remarks: OAL (inches): 2.08; 100-yard accuracy (inches): 1.30
500 Hornady RN IMR IMR-4198 26.5 1079
Remarks: OAL (inches): 2.24; 100-yard accuracy (inches): 2.50

jmort
03-06-2019, 12:38 AM
I am good at 425 grains
330 - 350 seems useful as well
Thoughts ???

jmort
03-06-2019, 01:01 AM
.458 SOCOM, 1.575 case length
Hornady 325 gr FTX, 2.140 loaded length
MAX loads, velocities estimated for 16" barrel
Type mc (gr) fill (%) vel (fps) Pmax (psi) Z (%) Pmuz (psi)
Norma 200 40.88 107.00 1828 35000 89.22 4777
Bofors RP1/NP ~approximation 40.88 107.00 1828 35000 89.22 4777
Hodgdon Lil'Gun 32.61 85.00 1815 35000 99.96 4132
ADI AR 2207 37.26 108.00 1811 35000 93.30 4553
Winchester 296 33.15 84.00 1808 35000 94.75 4468
Nitrochemie A/S 0300 40.60 107.00 1792 35000 85.31 4708
Vihtavuori N120 37.01 110.00 1780 34661 94.68 4276
Rottweil R910 29.71 87.00 1780 35000 100.00 3705
Hodgdon H110 33.28 84.00 1772 35000 96.98 4165
Alliant Reloder- 7 37.78 106.00 1766 35000 88.51 4313
Ramshot X-Terminator 42.26 107.00 1754 35000 79.97 4466
Nitrochemie A/S 0200 33.07 90.00 1752 35000 94.06 4046
SF-033 fl 41.42 110.00 1747 30629 87.69 4715
SNPE Vectan SP 10 42.98 109.00 1745 35000 77.87 4443
Hodgdon H4227 33.35 99.00 1744 35000 92.65 4027
PB Clermont PCL 508 43.03 109.00 1744 35000 77.85 4436
Vihtavuori N110 29.35 94.00 1744 35000 99.83 3665
IMR 4198 36.06 109.00 1738 35000 87.88 4131
Kazan Sunar 308W 39.65 110.00 1737 34728 85.78 4182
ADI AR 2219 41.14 108.00 1730 35000 78.84 4349
Hodgdon H335 43.75 109.00 1724 35000 76.67 4384
Accurate 1680 36.69 93.00 1721 35000 83.63 4050
IMR 4227 32.70 97.00 1721 35000 91.45 3884
PB Clermont PCL 512 28.51 81.00 1719 35000 99.80 3536
Accurate 5744 30.66 89.00 1716 35000 89.10 3960
Accurate 2200 39.13 105.00 1707 35000 77.97 4047
ADI AR 2210 41.21 108.00 1705 35000 75.81 4096
Alliant Reloder-10x 38.24 110.00 1703 29480 83.88 4352
ADI BM2 41.38 105.00 1701 35000 76.02 4050
Somchem S265 31.49 93.00 1687 35000 95.36 3617
Hodgdon H4198 35.93 104.00 1685 35000 81.14 3795
ADI AR 2205 31.21 89.00 1675 35000 96.15 3550
Accurate 2230 43.44 110.00 1655 31105 72.61 4059
Ramshot TAC 43.40 110.00 1652 31769 70.47 4074
Vihtavuori N130 37.89 110.00 1646 29188 83.05 3948
Alliant Reloder-12 41.33 110.00 1639 30545 76.47 3999
Hodgdon H322 39.35 110.00 1639 29939 75.65 4041
SNPE Vectan Sp 7 43.49 110.00 1638 28606 71.61 4134
Accurate 2015 39.21 110.00 1632 26711 80.05 4101
Somchem S321 43.62 110.00 1621 29445 69.55 4043
Hodgdon Benchmark 39.92 110.00 1621 30451 73.11 3790
Vihtavuori N530 40.75 110.00 1615 29748 69.77 3910
Winchester 748 43.62 110.00 1609 30341 67.82 3985
Accurate 2460 43.49 110.00 1607 27495 70.51 3999
PB Clermont PCL 507 42.30 110.00 1595 28802 68.28 3875

lar45
03-06-2019, 04:10 AM
Here is a shorter version that should come out around 325 grains.
The crimp groove is set for a 45-70 .400" nose length.
I'm not sure if you guys want the hp or not, but there it is.
We can always take it out later if needed.

237458

tradbear55
03-06-2019, 08:13 AM
Here is a shorter version that should come out around 325 grains.
The crimp groove is set for a 45-70 .400" nose length.
I'm not sure if you guys want the hp or not, but there it is.
We can always take it out later if needed.

237458

Definitely want one of these. I think this will be an excellent performer in my 45-70.

jmort
03-06-2019, 09:56 AM
I do not see how this works.
Case trim length is 1.575
This would have an OAL at less than 2.00" and much less if taper crimped on top band.
The OAL should be around 2.20" to 2.25" with a bullet like this.
I hope I am missing something, but this seems way off for the .458 SOCOM

The original design was closer to something north of 2.00" but not now.

hicard
03-06-2019, 11:54 AM
I do not see how this works.
Case trim length is 1.575
This would have an OAL at less than 2.00" and much less if taper crimped on top band.
The OAL should be around 2.20" to 2.25" with a bullet like this.
I hope I am missing something, but this seems way off for the .458 SOCOM

The original design was closer to something north of 2.00" but not now.

I tend to agree with jmort. I would like to see less shank and a longer ogive with maybe a smaller meplat and hp but allowing enough (length) room for a plastic tip if that ever gets into the plans. The weight in post 30 looks good.

jmort
03-06-2019, 02:31 PM
^^^ Agreed
Not sure there will ever be a plastic tip
Need HP option but enough meplat to be
Lead Bullets Technology

tradbear55
03-06-2019, 03:15 PM
If the meplat is too large it may cause issues with feeding in the ar platform, would it not.

jmort
03-06-2019, 03:30 PM
Yes, by definition
That is why we started with the Barnes tipped .458 SOCOM bullet.

hicard
03-06-2019, 07:44 PM
I'm just saying that I don't need a handgun size mammoth hp for expansion in a rifle bullet. I don't want it to fragment on impact, just upset a little. A smaller/shallower hp will expand ok. I am also more concerned about proper bullet overall length and smooth feeding in an AR than I am about expansion. Remember, the Barnes bullet we are discussing has no meplat. Barnes suggests an overall length of 2.230 (including the plastic tip).

pmer
03-06-2019, 07:55 PM
I think I would take one of your barnes bullets and grind the nose down till it matches the meplat in post 30. Then make a dummie round to make sure feeds from a magazine. I would try it from a full mag and a near empty one.

Just for reference;
The WFN I have pictured on the first page is a Accurate 46-405A. It has .400 nose length, .325 meplat and it will not feed from a factory magazine. But it works great with a little work to the mag.

The socom isn't a standardized cartridge either. Mine isn't cast friendly, it's a great shooter but it has a short throat and a tight neck.

hicard
03-06-2019, 08:18 PM
I think I would take one of your barnes bullets and grind the nose down till it matches the meplat in post 30. Then make a dummie round to make sure feeds from a magazine. I would try it from a full mag and a near empty one.

Just for reference;
The WFN I have pictured on the first page is a Accurate 46-405A. It has .400 nose length, .325 meplat and it will not feed from a factory magazine. But it works great with a little work to the mag.

The socom isn't a standardized cartridge either. Mine isn't cast friendly, it's a great shooter but it has a short throat and a tight neck.

pmer If you follow the ogive to just short of the front of your magazine in your photo, the meplat would be a lot smaller and still have room for a hp. I bet you would not have to file your magazines for proper feeding either. The Gould bullet expands well at 1400-1500 fps and has a smaller meplat and hp. I like the nose profile of your Missouri bullets, for example. I've said enough, can't use lead boolits in Kalifornia anyway.

pmer
03-07-2019, 01:23 PM
I'm not claiming to be any sort of 458 socom expert but if the goal is to get a type of flat nose to work in a AR, I had some challenges to get them working. It would be nice to have another member chime in with their experience. I've tried meplats from .250 - .325 and all of these boolits would work in a1895 Marlin with a .400 nose length. In the 1911 world I think they call it a 3 point jam, the cartridge ends up stopped at 45°. In the case of the socom there is a dent on the ogive and marks on the shoulder from the two top locking lugs of the barrel extension. The edge of the meplat wasn't really dinged with the wfn's.
My goal was for hunting with the socom using flat points so I never even bought any pointy style socom boolits for it. I did buy a couple boxes of 300 fp jacketed from the builder of the upper that I bought. He was reluctant to sell them saying "I'll probably have feed troubles" these were short oal's with about a .300 meplat. These would feed in a standard mag but only with 2 or 3 rounds loaded in the mag. Any more and the 3 point jam would occur.

I did eventually buy a .250 meplat Accurate 46-305s mold just for my socom. Even with the .250 meplat these would kinda "ker-chunk" there way in the chamber with a standard mag.

Again if some else has had luck with flat points in the socom please chime in. I wish I bought the Tromix but I didn't.

So anyways my notched magazine made all the feed troubles go away and opened up more options for different nose profiles in the AR. That's why I suggested to modify the barnes bullet to match the drawing to make sure it feeds before the buy gets going. I kinda like the longer nose of the first drawing myself.

lar45
03-07-2019, 04:57 PM
For anybody that loads the 458 Socom:
Do you roll crimp into a crimp groove, or taper crimp?
It's looking like trying to find a compromise that would work in the 458 Socom and 45-70 isn't going to work very well.
So I'm wonding if we need to split this and work on a bullet for the Socom and then do another one for the 45-70?
If we are going to make a bullet design for the 458 Socom, do we need crimp grooves at all?

tradbear55
03-07-2019, 05:12 PM
I think you are correct. This will probably have to be one or the other. I looked at COL of both rounds and don't think you can have it work for both. I agree, probably better to do separate designs. As to type of crimp, I can't answer.

jmort
03-07-2019, 07:42 PM
I want a .458 SOCOM dedicated bullet.
So a crimp groove, cannelure would be nice, but not necessary,
Let's see what Lar comes up with.

pmer
03-08-2019, 11:11 AM
pmer If you follow the ogive to just short of the front of your magazine in your photo, the meplat would be a lot smaller and still have room for a hp. I bet you would not have to file your magazines for proper feeding either. The Gould bullet expands well at 1400-1500 fps and has a smaller meplat and hp. I like the nose profile of your Missouri bullets, for example. I've said enough, can't use lead boolits in Kalifornia anyway.

237582

Thanks, the 46-405a is a great boolit. Here is a pic of a deer that could of swore it was shot with a 45-70! But no it was a .458 SOCOM using a 45-70 boolit. This guy was a horn dog pursuing doe's and chasing off bucks.

But back to a custom .458 SOCOM boolit. A crimp grove isn't a big deal for me but it is nice to help remove the case flare. Would it be possible to make a 4 petal HP in the 350 - 370 grain range. Having the petals open but stay on the boolit.

jmort
03-08-2019, 11:28 AM
Penta pin would do that nicely
These are .458 SOCOM designs

237584

237585

dkf
03-08-2019, 01:40 PM
If the meplat is too large it may cause issues with feeding in the ar platform, would it not.

Not if the parts are made right. I am running piledriver clones (350gr and 405gr) in my .458 socom and they have a .380" metplat. Also use the ranch dog 350gr and .462 hammer with slightly smaller metplats. Its a Tromix though and not a knockoff.


IMO from seeing the drawings posted on the previous page the nose is too short. The top band can be long but it can not stick out too far past the case mouth or you will hit the throat. To get to minimum COAL (especially sized to .460") you could hit the throat with the top band. Especially on the Tomix/TJ chambers. The PTG chamber can have a slightly longer throat.

The 46-325S is a good choice IMO. Plenty of top band and a long enough nose to easily get minimum COAL without hitting the throat. I'd be in on one of those. Maybe even lengthen the bottom band a little (to match the top band) and make a "gould" style HP pin.



For anybody that loads the 458 Socom:
Do you roll crimp into a crimp groove, or taper crimp?
It's looking like trying to find a compromise that would work in the 458 Socom and 45-70 isn't going to work very well.
So I'm wonding if we need to split this and work on a bullet for the Socom and then do another one for the 45-70?
If we are going to make a bullet design for the 458 Socom, do we need crimp grooves at all?

I use the Lee .458socom Factory Crimp Die (collet style) to remove the flare. I don't use crimp grooves. The neck has plenty of grip on the bullet to keep it in place. New brass actually has the neck way undersized for cast and has a death grip even on jacketed bullets.

jmort
03-08-2019, 03:44 PM
Nice
Agree

lar45
03-08-2019, 10:36 PM
Okay, I think I'm getting closer.
No crimp groove
Equal length driving bands and lube groove
Longer nose
Thanks for all the details.
How deep do you want the HP to go?
If we make the nose any longer, then you won't have much left in the neck.

237613

hicard
03-09-2019, 10:19 AM
That is it. Exactly what I was looking for. Sign me up. What will the weight be? That hp looks great to me. Thanks lar45 for the great work. All 458 socom shooters should jump all over this one. hicard21atoutlookdotcom

jmort
03-09-2019, 10:22 AM
Normally we can get pins for small cup, large cup, penta, and blank.
Comparing it to the 46-325S we are real close. What weight are you estimating?
I am thinking the top band could be stretched a bit.
Thank you for all your efforts on this.

jmort
03-09-2019, 10:27 AM
That is it. Exactly what I was looking for. Sign me up. What will the weight be? hicard21atoutlookdotcom

Great minds think alike. I did not see your post. Sign me up for two.
middle earth sales and service at g mail dot com.
So we are at least at three and growing.

lar45
03-09-2019, 05:05 PM
I'm thinking that the weight we be around 305 gns.
It's a little lighter than what we were shooting for, but it looks like it will be a pretty well balanced boolit.

hicard
03-09-2019, 06:57 PM
Well, I love the bullet as is but I am open if others would like it a little heavier. As is, I could also use it for my 45 Win Mag M1 carbine. You still have room to lengthen the nose (ogive) a bit and the shank by lengthening the upper and lower bands a little. A slightly smaller meplat by extending the ogive would make the bullet even more streamlined and there is still lots of room to fill the magazine up so the bullet doesn't slide back and forth so much. You could aim for a total cartridge length of 2.230, or less, max. As it is, the length is from 2.03" to 2.12" depending on seating depth.

bluejay75
03-09-2019, 08:09 PM
Awesome collaboration. I will post this as a GB in the morning.

jmort
03-09-2019, 08:18 PM
Sweet

dkf
03-09-2019, 09:43 PM
Drew this up in cad. The 46-325S on the left and lengthened lower band to match top band on the right with Gould style HP cavity. My guess is the bullet would probably be pretty close to 330gr with the HP cavity like the original gould. Trying to keep the nose long enough without having too much unsupported weight in the nose vs the base.

https://i.imgur.com/ESOvIvC.jpg?1

jmort
03-10-2019, 12:16 AM
Looks good. They added weight can be diminished by the hollowpoints and the larger driving bands make crimping easier. Also, we have one caliber diameter in the case. Regardless we seem to be in general agreement.

dkf
03-10-2019, 12:40 AM
I figure the bigger meatier bands would help when using softer alloys.

Smoke4320
03-10-2019, 08:58 AM
watching with interest.
I have a Rock River 458 socom. Use mostly RCBS 45-300
Would love a penta hp or a deep hp

pmer
03-11-2019, 07:39 AM
I like the added weight in dkf's drawing.

My upper is a SOTA arms.

hicard
03-14-2019, 11:59 PM
What happened?

244
03-15-2019, 12:36 AM
I have loaded several bullets in the .458 SOCOM, all jacketed. I have not tried the Barnes TTSX. My favorite so far is the Hornady 325 grain FTX bullet. I had zero issues with the 405 grain Remington flat nose bullets feeding, but think the 275 to 350 grain range is in the SOCOM's wheelhouse.

Marty (Dutch last name that I cannot spell correctly from memory, Van De Veere?) originated the .458 SOCOM. His website is still operational, but I don't know how current it is: http://www.teppojutsu.com/

I agree that a band/crimp groove is a good idea for this cartridge to facilitate a roll crimp.

As for magazines, I use aluminum GI mags and put a half-moon grind on the front to prevent cartridges from hanging up there. I did this without waiting for an issue as I hand cycled rounds and pushed them straight out of the magazine and it looked like a potential snag point, so I preemptively made the grind. Another reason to roll crimp; one less potential snag point with unmodified magazines.

I'm interested to see where this ends up!

jmort
03-15-2019, 11:37 PM
Awesome collaboration. I will post this as a GB in the morning.

Well ??????????

thraxx
03-18-2019, 10:11 AM
Is this our bullet?

http://castboolits.gunloads.com/showthread.php?378723-MP-Molds-C460-305S-458-SOCOM

jmort
03-18-2019, 10:16 AM
Yes, it looks as close to what we all wanted if stuck in a blender
I am getting solid and HP both non-lube-groove
That will make for one big, unitary, driving band
Really excited about both the solid and the Penta Pin HP

jmort
03-18-2019, 10:17 AM
I am using the Tromix Lancer mags they modify
Recommended

pmer
03-18-2019, 05:50 PM
I haven't shot a boolit that looks like that mp- 305S. It looks like it's center of mass is forward in the nose someplace? Short shank and long nose? I think you're estimating the weight of that boolit heavy as well. I bet it will barley make 300 as a nlg fn.

jmort
03-18-2019, 06:27 PM
"Mr. Glenn Larsen has come out of design retirement AGAIN to offer the Design the MP Molds C460-305S- 458 SOCOM . It is spec'ed out for around 305 grains maybe a little over as a solid and 290ish with the largest HP. Should really optimize the performance of the standard twist rate and potential of the cartridge. Pin options is where this will be a must have. Will come with Large Penta..."

Mr. Larsen either did it right or not.
I am putting my trust in him.

jmort
03-18-2019, 06:31 PM
Please close this thread
Thank You

pmer
03-19-2019, 06:50 PM
Now what would be nice is if someone could make silicone tips to glue in for them to the specs for one of the pins that are offered.

I had an idea today about tips for a hollow point. I have never swaged anything before but would it be possible to swage a tip out of soft lead and press that into a hollow point?

Would a Rock Chucker be strong enough to swage a piece of soft lead to the shape of a polymer tip?

Press that into a medium to heavy weight socom boolit.