UC

OK just got back form Doc's site - I had to go look what a Thunderbolt is/was - I actually like the looks of that gun...



Do you still have that gun? I think it would be a great canidate for a 25acp... other than the sticky 209 BP how did it shoot?

The original BP I got with my U-Mag was a bear after about 5 or 6 shots, but with the new BP no problems....

Aside from all it's issues, the rifle is VERY heavy. Heck no, I finally got the boys in Utah to fix me up with a 98 in a 91 stock and got a bit of refund as well. I still have the 98 and it's a great rifle. Even the .25 ACP would probably be too long for the White breechplug (andy you are familiar with the White 209 breech plugs). Take a look at one of yours and see what you think. Doc thought along those same lines but had to Doc'izeand so created the 336 ignition system, which does help immensely I'm told.
His version uses the .32 S&W Short case which is about 1/1000" shorter case length than the .25ACP but perhaps a better rim. I don't know if that plug has a concave on the powder end but you can see there isn't much room left for metal along the flame channel.

Underclocked

So, did he just cut the length of the 25acp done to fit and call it a 336?

Was it much heavier than the U-Mag...

No, it's the .32 S&W short case. Probably a pound heavier than the Umag with a laminated stock.

UC

OK - wish i had one of those conversions - i would like to try it in the U-mag - but I would need away to hold the shell in place until the hammer dropped - something like a 209 spring - would not have to be much.


Ouch that is a heavy gun....

Doc could probably fix you up and he might even do an ACP case since you are already set up for those. Might have to shorten some cases a bit to gain some metal around the fire channel.

ps: does the head of an ACP case even fit inside the opening on a UMag 209 hammer? And I don't know if the standard spring would be enough to keep the case from trying to blow back out at you. And I don't know if there would be room for a standard case to be inserted/removed (doubtful). I think you would be talking major re-design.

I don't think you want to do that with a UMag, the TBolt uses the bolt to lock the 32 case into place and prevents it from setting back when fired, plus the TBolt has a fireing pin instead of a bump on the hammer plunger. Without that bolt holding the case in place it would likely fly out the back creating much danger to the shooter. Be carefull.

smurf, ah wuz tipin while u wuz postun.

UC

I am e-mailing him right now to see about getting the conversion and whether I can adapt it to a U-mag.

I think the 32 short might be a better shell in the limited space if the it is shorter than the 25.... Gotta go look it up is a 32 short different than a 32acp? I have figured out is is a different shell but I can not find any measurements on it at all...

Even using Randy "O" ring as the method to hold it in place....

goatbrother

I agree with the thought but i do not think that would be a problem... The A&H is built somewhat on the same design. Randy's 32 H&R Mag conversion works very well in it.

When you close the bolt on the A&H nothing touchesthe shell until you drop the hammer on to the shell. I wish I had the gun here to show you what I am talking about but my son-in-law thought I had to many inlines so he borrowed it 3 years ago.

If you look at the picture you can see he uses a rubber"O" to hold the shell in place while hunting + it would allow the venting of any gasses that were to get by the shell. It is very effective in the A&H..

I believe Doc's heavy duty spring would have no problem handling thepressure of the shell coming back. it certainly holds a 209 in place without any hint of coming out of the 209 cavity. As long as the flash holeremains the standard I see no real problem with back pressure + remember the case will absorb some and expand up against the walls of the BP and then release as it cools..

I included a picture of the A&H BP in one of these posts as well as over in DWB's where there was a brief discussion of this point.

I have sent an e-mail to Doc aboutmy thoughts...