30-30 BFR getting a makeover going big bore.

[Ramjet-SS]

Waiting on a RMA to send my 10" BFR in to get it changed over to a 458 SOCOM.

Seems like a much better way to get the most from this fine handgun. The SOCOM can run 140 grain poly all the way up to 570 Grain Lehigh fragmenting bullets. I have a rifle already so this will make fine companion to it. This a fun cartridge and is real hammer of caliber.

I just got a new mold for the SOCOM 46-460GC from Accurate. This is hammer of bullet with lube and GC runs 455 grains. Should be allot of fun from the handgun.

I really excited about this project.

[lar45]

What barrel length are you going with?
I've got a BFR in 454/45/410 that I've been thinking of sending back to get a 375 Win cylinder and barrel for it, or maybe just get a 460 cylinder fitted to it. I wish that they would offer calibers with a .510" bullet.

[Ramjet-SS]

10" barrel Should have good velocity the 458 loads up pretty well with 296 or H110.

Cylinder gap on the BFR is very tight.

I ay add a 45-70 cylinder as well companion gun to my Encore Rifle.

[Whiterabbit]

What barrel length are you going with?
I've got a BFR in 454/45/410 that I've been thinking of sending back to get a 375 Win cylinder and barrel for it, or maybe just get a 460 cylinder fitted to it. I wish that they would offer calibers with a .510" bullet.

I hear you. I asked them very specifically about a .510 bfr, they said they will not do it. any BFR. no .510.

My understanding is JRH will bore out a BFR cylinder to .510 and rebarrel.

[Whiterabbit]

How much powder can you get into a 458 socom case? I bet you can shoot bullets up to 750 grains in the BFR, just due to the cylinder length. (and not even fill the cylinder still). If you can get about 20 grains of capacity wiht typical 45/70 powders, you are there.

[Ramjet-SS]

well a 300 grain hollow point j-words loads of 34.0 grains of certain powders is not uncommon. My rifle loves 29.0 grains of WW 296 and that sits below the bottom of the neck. So I think making sure you are with design pressures you could do a 750 grain sized for the bore ride in the cylinder over all length would not be an issue in the BFR long cylinder. I would guess you could get 900 FPS from the 10" BBL pretty easily. the question would be if it's fast enough to stabilize the heavy bullet.

[Ramjet-SS]

I may have them fit up a 45-70 cylinder while they have it. That may be redundant so I will see.

[Whiterabbit]

well a 300 grain hollow point j-words loads of 34.0 grains of certain powders is not uncommon. My rifle loves 29.0 grains of WW 296 and that sits below the bottom of the neck. So I think making sure you are with design pressures you could do a 750 grain sized for the bore ride in the cylinder over all length would not be an issue in the BFR long cylinder. I would guess you could get 900 FPS from the 10" BBL pretty easily. the question would be if it's fast enough to stabilize the heavy bullet.

Yep, it'll work for sure. And you nailed it by the way. 740 grains goes 920-950 fps with ~20 grains of 4198 (I wouldn't load that without me checking my notes for the exact number). It was clear from the cases that they could be pushed MUCH harder, given a pressure ceiling of 65 ksi (which is the limit of my case via SAAMMI)

As to stability, well, 9 of the 10 I shot went through the target straight.... :)

------------

It's like shooting 700's through the 500S&W. a novelty, but worth trying if you have an extra couple weeks with no projects moving forward.

Personally, I'd be looking at shooting 400-450 grain LFN WFN bullets, I bet you can get a pretty good load going real easy that you could never shoot in your rifle for feeding issues.

[Ramjet-SS]

Very interesting and man o man what a hammer!

[Whiterabbit]

oh! found a pic. 9 round holes, one, ah, tumbled. :bigsmyl2: 50 yards, rested, shot-in-the-dark powder charge. Gun recoiled like I was shooting 45 colts (maybe mid-frame blackhawk 45 colt, but not as much recoil as a large-frame blackhawk maximum 45 colt +p would recoil). Chrono said I think 920 fps.

http://castboolits.gunloads.com/attachment.php?attachmentid=158029&d=1452709049

I imagine I could tighten up the group by adding more powder, but it's really hard to commit to casting and loading a half pound of lead for every cylinder full!

10" long 16" twist barrel.

http://castboolits.gunloads.com/attachment.php?attachmentid=65955&d=1364705832

guess which one is 740 grains.

[Whiterabbit]

Oh, actually, this is pretty cool:

http://www.loaddata.com/images/database/458%20SOCOM.gif

1.23 inches to the shoulder. Given a 740 grain bullet length about 1.7 inches, that means your COAL if you seat the gas check to the shoulder, is just a hair under 3" long.

It would just fit the cylinder of your 30-30 BFR.

:bigsmyl2::bigsmyl2::bigsmyl2::bigsmyl2::bigsmyl2: :bigsmyl2::bigsmyl2:

(I also laugh at the fact that the bullet is longer than your cartridge case)

[Ramjet-SS]

That is funny. BFR is a 14" twist so should better at the same velocity.

[Whiterabbit]

cool. My BFR is a .452, I smoosh the 458's down. That's why the 16" twist. If you have a 14, so much the better for heavies. My "sweetspot" seems to be in the high 300's (I like to shoot a 425 as my go-to load though), so I suspect 400-450 will do you well.

[Ramjet-SS]

Is that bullet nose a bore ride I wonder if one would have to seat it deep because the lead in the cylinder may taper quickly?

[Whiterabbit]

I can't say. I can say that if you put that bullet through a .452 die the, uh, ogive, is not touched. I believe it is in fact a borerider, designed I believe for 460 weatherby. No other case really makes sense for such a bullet. My cylinder throats are a consistent .4525 (+/- .0005) all the way down. I had always assumed cylinder throats were cylindrical, not tapered. And if by lead you mean the transition from the chamber to the throat, well if my bullets are sized .4525 and so is the throat, then the lead can be a fast taper or slow one and the rounds should still chamber without issue.....

do you anticipate chambering issues with bore riders or even long seated full diameter bullets give a short or long lead?

[Ramjet-SS]

Potentially it depends on the chamber diameter if it is not tapered at all we should be good. I seat the 460 deep so they will run through my AR SOCOM so those loads will not be problem for sure.