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Basic
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Posted: 12/10/2009 3:35:27 PM EST
Anyone have any powder recomendations for or experience reloading 45 acp for use in a 16 inch barrel semi auto thompson 1927? I hvae more than 30 loading manuals, but nothing uses this as a test firearm.
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Posted: 12/10/2009 3:46:16 PM EST
[Last Edit: 12/10/2009 3:49:29 PM EST by Andras]
the Lyman handbook has data for a Marlin Camp Carbine 16" barrel.

What weight bullet are you looking for data?
for the 230gr FMJ it lists
Unique 5.5-6.8 gr (733-974fps)
BlueDot 8.5-10.2 gr (787-1034fps)
SR4756 6.0-7.0 gr (597-894fps)
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Posted: 12/10/2009 6:15:49 PM EST
Blue Dot. The 16" barrel should take care of the normal Blue Dot Fireball as well.
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Posted: 12/10/2009 7:20:32 PM EST
[Last Edit: 12/10/2009 7:38:11 PM EST by 500SWshooter]
I was thinking blue dot, with a 230 the Thompson has a really heavy bolt and stiff recoil springs. The 255 Gr colt bullet might also work, but im not sure it will feed reliably.
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Posted: 12/10/2009 8:02:04 PM EST
Although I really want to build up some loads with a slow-burning powder for my 45ACP carbines, I've only gone so far as working up loads with Power Pistol with 230gr XTP's. They're hot loads intended for 45 Super, though.

Power Pistol is generally one of the slower burning powders for pistol loads, so it's something that can be made to work well in either or. It's probably a compromise though, and a slower powder could probably be used for dedicated carbine-length loads.
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Posted: 12/10/2009 8:50:42 PM EST
Originally Posted By 500SWshooter:
I was thinking blue dot, with a 230 the Thompson has a really heavy bolt and stiff recoil springs. The 255 Gr colt bullet might also work, but im not sure it will feed reliably.


I have a Midway LoadMAP booklet that has load data for the 255gr LSWC bullet in a 45ACP case
It doesn't have Bluedot listed though (max pressure 21,000psi)
Bullseye- 3.1-4.2gr
Herco- 4.3-5.9gr
RedDot- 3.0-4.1gr
Unique- 4.2-5.4gr
Win 231- 3.5-4.6gr

I have loaded some rounds with the 250gr XTP using Unique, it fed fine.
6.4gr (20,000psi, 820fps w 5"barrel) worked fine in my Oly 45carbine
the load map give a range of 4.8-6.6gr of Unique for the 250gr XTP

For the Speer 250gr Lead SWC, it lists these loads:
Bullseye- 3.7-5.5gr
Herco- 5.2-7.8gr
RedDot- 3.8-5.4gr
Unique- 4.7-6.9gr
W231- 4.1-6.0gr

I was surprised that the slightly lighter bullet allowed much more powder.
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Posted: 12/11/2009 12:37:40 AM EST
[Last Edit: 12/11/2009 12:39:52 AM EST by gunguy45]
I run VV N340 in my Reising, and Stemple, with 230 grain bullets.
VERY CLEAN, but it is also more expensive.
My 16" semi Thompson also liked it. I used to load 260 gr. hollowpoints(Speer) for it.
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Posted: 12/13/2009 7:35:45 AM EST
Ramshot used to list an Enforcer load for 230 grain hardball that would do 1050 with normal .45 ACP pressures out of a 5" barrel. Large fireball, though. You might look at that load.
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Posted: 12/13/2009 1:18:46 PM EST
[Last Edit: 12/13/2009 1:20:22 PM EST by ma96782]
You could do it the hard way or the easy way.

Everything that the military used for their .45ACP M1911 pistols also ran with their .45 ACP Thompsons, etc.....

Military Loads w/ Commercial Powder

www.frfrogspad.com/miscellq.htm#duplicate

Aloha, Mark


"Guns don't kill people......the Government does."

Dale Dribble
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Posted: 12/13/2009 7:25:31 PM EST
Enforcer powder sounds interesting and I think I will give it a try, just have to find some locally.
296 / h-110 is way too slow and not recomended anywhere( I do nont intend on using / trying it). Is anyone aware of anyone who has tried it and what was the result? Just curious

As far as the function of the gun goes, Im sure any millitary duplication load will work just fine, but a dedicated rifle loading should work better at least in theory.
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Posted: 12/14/2009 6:58:00 PM EST
Originally Posted By 500SWshooter:
Enforcer powder sounds interesting and I think I will give it a try, just have to find some locally.
296 / h-110 is way too slow and not recomended anywhere( I do nont intend on using / trying it). Is anyone aware of anyone who has tried it and what was the result? Just curious

As far as the function of the gun goes, Im sure any millitary duplication load will work just fine, but a dedicated rifle loading should work better at least in theory.


If you will be pushing any pressure, perhaps moving to .45 Super brass might be a good idea. Just in case.
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Posted: 12/16/2009 9:53:24 AM EST
Originally Posted By ma96782:
You could do it the hard way or the easy way.

Everything that the military used for their .45ACP M1911 pistols also ran with their .45 ACP Thompsons, etc.....

Military Loads w/ Commercial Powder

www.frfrogspad.com/miscellq.htm#duplicate

Aloha, Mark



this––-also the sierra manual has data using the marlin. dean grenel's book has data for the thompson. since i no longer own a 45 acp i no longer catalogue the data.
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Posted: 12/16/2009 4:04:45 PM EST
Originally Posted By 500SWshooter:

As far as the function of the gun goes, Im sure any millitary duplication load will work just fine, but a dedicated rifle loading should work better at least in theory.


It almost never works out that way! In most cases, the load that gives the best velocity and function in the pistol will also give best velocity and function in a rifle. I now work for the most accurate load in each firearm, and oddly enough its usually the same.

G
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Posted: 12/16/2009 5:23:09 PM EST
Book max load with HS-6 and 800X both got me 1080fps in a 10" barrel with a 230gr bullet, along with a sore shoulder after a number of them fired.
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Posted: 12/16/2009 5:41:45 PM EST
I loaded and fired some 250gr lead RNFP bullets over 6.9gr Unique. This should hit about 920fps in a 5" barrel according the the book I have. It fed and fired fine out of my Cav-Oly carbine. It ballistically duplicates another load I made using 250gr XTPs @ 920fps, but that requires .45 Super levels of pressure and cases.
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