10mm great load 200g RCBS SWC

[10mmShooter]

I've been working up my new 10mm loads with Accurate #5...previously I had been using WW231. I've been using 170 SWC, 180 LRN, and 200 SWC all RCBS molds.

But today with the the RCBS 200 grainer, that I loaded on my Dillon 650....all I can say is wowww!!!! In my TWO 610 revolvers(they are indentical) I fired 30 rounds(3 in one gun 2 in the other). My extreme spread was only 40 fps.....for me any ES lower than 50 fps is great for a pistol round loaded from a progressive press. Check the standard deviation 9.51..thats incredible. This loads chrono's better and specs better than my control round which is Federal 180g Hydra-Shoks.

Unfortunately the 170 and 180 grainers...exhibited more normal behaviour with 7.3g of #5 their ES was 51 adn 40 respectively with SD of 14.4 and 13.0 still very good for a pistol round.

My conclusion is the with the 200g being a very long 10mm round, case was almost completely used with the bullet and powder...making for very very consistent ignition. The 170 and 180 being nearly 1/8 inch shorter left more air space so ignition was not nearly as presice and repeatable.


Just had to post the my data on the 205grainer [smilie=w:

Usual disclaimer....you blow yourself up...thats on you.




http://www.keithrussell.net/205.jpg

[94Doug]

What load did you use with 231, if I may ask?

Doug

[9.3X62AL]

That's a healthy and consistent competition load, for sure.

I am HUGELY in favor of the 200 grain-class bullets/boolits in the 10mm. My experience is entirely with autopistols, though. The round really comes into its own with AA-7and Blue Dot using the 200 grain RCBS castings. I plan to cast some soft-point versions of this boolit and take them deer hunting this fall, assuming I can get a tag in a lead-bullet zone this year. The Condor Cuddlers have disallowed lead bullets in my local zone. Serial expletives deleted.

I've tried AA-9, WC-820, and 2400 in the 10mm using 200 grain Hornady XTPs. Accuracy is petty good, and velocities well past 1100 FPS in the S&W 1026 are no strain on the pistols. Glock and Colt 10mm platforms should probably stop the music at 1100 FPS, though.

I need to do some more "R & D" with the 10mm and the 200 grain castings. AA-7 and Blue Dot did so well for me that I sort of rested in place.

[10mmShooter]

Hi Doug,

I have only recently got my Chrony, I checked my old loads for WW231 in my 10mm for the 171 g SWC I was using 4.6g of WW231 and it chonrys at 880fps out of my SW610. The 205g SWC chrony'd at 820 fps with 4.2g of WW231. As you can tell I was running a touch light with my old loads....thats why I got a chronograph.( I wanted to get closer to 1000 fps + since I'm paying a premium for the Lyman #2 alloy...need to take advantage of that extra hardness)

Once I started casting my bullets I use only Lyman #2 alloy from Rotometals...so I needed to add about another 150 fps to my loads, and since WW231 has spotty availability right now. I switched over to AA#5. Im very happy with AA #5. I'm saving my WW231 for my .38 loads.

7.3 g of AA#5 is pushing my 171g and 181g SWC at right around 1050 fps. Which spot on for what the Accuate Arms Manual shows.

and no leading...yes I mean no zero leading at those velocities. out of both 610 revolvers and my Delta GC.

[94Doug]

Thanks!

Doug

[Intel6]

I have been shooting the 10mm for many years and like the heavy bullets.

I mainly have been shooting the Lyman 200 TC mould that comes out at 213 grs. with wheelweights for me. That bullet doing right at 1,000 fps is a great shooter. enough ummph to let you know you are shooting a 10mm but not too much.

I recently got an LBT mould that is marked as a 200 gr. WFN gas checked. When I cast with WW's it has been coming out at 225 after GC and lube.

I have been working with that bullet and 800X both out of my Glock 20's and my 6.5" 610 revolver.

In the pic below you can see a pulled 200 gr. GC WFN from some Doubletap ammo, my own cast WFN that has a GC seated and sized but with no lube and the lyman TC bullet sized with only the lower lube groove filled.

[BLTsandwedge]

10MMShooter, your ES/SD values look identical to what I'm getting from both AA#7 and Power Pistol, with the slight edge being awarded to Power Pistol. A 401638 over 7.9g Power Pistol provides for 1,200fps and a SD value of about 11.....with competition accuracy. Dropping down a bit to 7.3g Power Postol gives up only 40 to 50 fps and hits the sweet spot on the 610.

How did you post the Excel worksheet?

Tom

[10mmShooter]

Intel,

Nice looking bullet you have. What do you think about your brass, I notice becasue of rather long bearing surface my 200g+ lead 10mm. It has as much bearing surface as a 250g SWC 44 Keith bullet. Lots of contact with the rifling, that what makes it such a great shooter.

Anyway I notice mine set deep in the brass at 1.250 OAL. I'm wondering what the long term stresses on the brass the will be like. To seat that 200grainer I also have to bell the case larger than I do with the 170 and 180 grainers. I' m wondering how many reloaded I will get out of my brass.

Here a pic demonstrating how large that 200g is. oh yea the 180 LRN is not sized or lubed.

wow the camera makes bullet I thought looked good...look only okay :(

http://www.keithrussell.net/200g.jpg

[Cherokee]

I always used BlueDot for the 200 gr TC bullets @ 1.23" OAL. This load clocked 1046 fps from my Javelina 7" with ES of 61 and SD of 9. 486 energy, 209 power factor. But I never could get it to shoot better than 2.5" @ 25 yd. I found AA9 also gave good performance but never got around to clocking it.

[JTknives]

Intel,

Nice looking bullet you have. What do you think about your brass, I notice becasue of rather long bearing surface my 200g+ lead 10mm. It has as much bearing surface as a 250g SWC 44 Keith bullet. Lots of contact with the rifling, that what makes it such a great shooter.

Anyway I notice mine set deep in the brass at 1.250 OAL. I'm wondering what the long term stresses on the brass the will be like. To seat that 200grainer I also have to bell the case larger than I do with the 170 and 180 grainers. I' m wondering how many reloaded I will get out of my brass.

Here a pic demonstrating how large that 200g is. oh yea the 180 LRN is not sized or lubed.

wow the camera makes bullet I thought looked good...look only okay :(

http://www.keithrussell.net/200g.jpg

what is your OAL of them 200gr, you say long but how long?

[10mmShooter]

JT I seat the 170/180/200 all to 1.250 over all cartrigdge length.

[JTknives]

JT I seat the 170/180/200 all to 1.250 over all cartrigdge length.

I meant how long is the boolit from nose to base, I'm guessing around like .645 or so

[10mmShooter]

JT

.7150 on avg roughly.... .7130-.7185

[JTknives]

JT

.7150 on avg roughly.... .7130-.7185

O WOW a lont longer then i thought. my 200gr WFN is .630 well its actually 204gr but that will give me some leeway for alloy with tin. with the shorter boolit in the .630 range you can push them to around 1400-1450fps in a glock with a after market barrel.

[mpmarty]

I just ran a bunch of 200gr JHPs over 12gr of AA9 and was amazed at how clean this stuff burns. I used new Starline brass and the fired cases looked like the new ones inside.

[excess650]

I've been meanin' to cast for my 610, but haven't yet. It was incredibly accurate with AA#7 and 180gr XTPs.

Personally, I wouldn't have considered 231 to be a good powder for the 10mm except for light loads. I used several jugs of AA#5 in my 40 S&W and liked it with 175gr cast, and thought it might be a a good candidate for the 10mm with cast.