I shot some 9mm Montana Gold 124 grain JHPs in 38 Short Colt brass (I used 5.6 grains of True Blue powder) and got almost the exact same group size at 7 yards as I did with Acme 125 grain coated bullets. The Acme's were .358 when I measured them with my calipers.
I am kinda curious about this from the standpoint of making simple practice rounds with the 9mm Blue Bullets I have on hand anyway. Might just go down and slug one through my 686...
38 special
147gr G2 over 6gr be-86
880fps
253 ft lbs
147gr G2 over 5gr win231
887fps
257ft lbs
The be-86 is uncharted waters so I'm unsure if I want to go up. I might try 5.2gr 231.
I'm not looking for magnums just looking for the 9mm rated velocity.
147gr G2 over 5.3gr win231
910fps
270ft lbs
That was in my 4" m19-3 which is a very slow gun. I tested the loads in my m66-8 the other day which is sometimes faster even with it's 2.75" barrel.
Next time out I'll test in a 4" and 2" m10.
No pressure signs.
5.3grs gets 910fps in my 4"m19-3 and 920fps in my 4" m10-10. I was hoping for about 1k so I'd get k with 4" guns and 900 in 2" guns. Not sure where I'm going to go from here.
What kind of accuracy are you getting?
You're looking at the wrong data for your extrapolation. Look at 38 Super data and pressures for inspiration and (hopefully), pressure tested data. The Super case is slightly shorter than 38 Spl, and the pressures are considerably higher in the "+P" versions. Do this at your own risk, but I tried it in 357 revolvers, and while seemingly safe in my guns, YMMV. To get even closer to the Super, you could always trim your 38 Spl cases to 38 Super length, and do your load development from the recommended starting loads until you don't like what you're seeing, or until you get what you want. If this fails, 38-44 data is out there, but I wouldn't expect any K frame or smaller to live very long under those conditions. Pressures would be at .357 mag levels.
I imagine a Redding 38/357 "Profile" crimp die could be very useful for your project.
Malo periculosam, libertatem quam quietam servitutem
I prefer the tumult of liberty to the quiet of servitude
-Thomas Jefferson
I prefer dangerous freedom over peaceful slavery.
I haven't tested it for accuracy yetOriginally Posted by Flamingo
This is a post from arfcom
@03RN No BE-86 in GRT.
Interesting results on everything else. I set the top pressure at 22,600 (just barely over +P+) and set the desired fps at 950-1100. Here's what I got:
Accurate #9: 10.16gr at 22549psi. 1053.8fps
Alliant 2400: 10.6gr at 22546psi. 1070.5fps
Hodgdon HS-6: 8.13gr at 22597psi. 1047.0fps
Ramshot Silhouette: 6.41gr at 22562psi 1008.9fps
Accurate #7: 9.65gr at 22603psi. 1068.4fps
Alliant Power Pistol: 7.13gr at 22592psi. 1043fps
Hodgdon Lil Gun: 13.32gr at 22537psi. 1121fps
And finally dryflash's favorite powder, Ramshot True Blue: 7.1gr at 22536psi. 1018fps
Looks like we've got a new contender! Lil Gun coming in at 1121fps and still staying at +P+ pressure. Liking that a LOT! It's a full case at 97% full but a fairly nasty 62% burn. I'm betting the fireball will be impressive.....
ETA - 13.1gr keeps you at +P and GRT is showing 1096fps. 21376psi. I'm thinking (if the simulation is correct) that'll get you 1k out of your 4" in real life numbers. As stated, USE AT YOUR OWN RISK!
Here is one to wet your whistle. Cast a bullet to match you barrel and Look for anything Skeeter wrote
http://www.sixguns.com/tests/tt38spcl.htm
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