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Dry fire and aluminum


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Hi guys I just got this 1927a1 and when i take the drum out is it ok to dry fire it. Just pull the trigger to release the pin I dont mean like over and over like dryfiring a pistol.

And I see it says no steel ammo but would aluminum case ammo be ok? I only get that when i find it on sale and right now my local wallmart had a bunch of it.

 

I have had it out twice. the stick mag some times the bullet get side wasys and you have to pull the blot back and get it to go straight.

 

 

And also it fails to fully seat the cartridge in the barrel it goes in all but like an 1\8 or 3\16 or so.

going to go back out sunday with it and try the mad and drum both again.

 

will try and get my brother to do the same with his tommy pistol and see how it feeds.

 

Been trying to find out about the dry fire and that's how I found this Forum

 

 

Also I was wondering if the muzzle velocity is faster on a longer barrel gun than a pistol.

Does the pistol round loose force by the time it gets done with the longer drag and volume of the thommy barrel

I saw on here before someone had a chart but now that I could see it I cant find it. I was shure it was there that I saw it

 

 

LOVE THE THOMPSON

thanks rick

Edited by rick57
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For dry firing, I would only use .45 ACP dummy rounds made for that purpose. Otherwise, damage, especially to the firing pin, may occur.

 

My experience with a Thompson 27A1 carbine that I bought in 2012 is that they have a break in period wherein the parts smooth out. Functionality, including ease of cocking, improves after what turned out to be quite a few (more than 200) cycles.

 

IIRC, most commercial .45 ACP, 230 gr. ball ammo velocity generally peaks out at barrel lengths of about 10-12 in. but doesn't start to drop off till after 18-20 in. So a 16 in. barrel will typically provide bullet velocity in a flat range of approximately peak velocity. The Thompson 27A1 is closed bolt, simple blow back operated so there may be some variations compared to other firearms. And of course, there are variations between different brands of ammo, mass of bullet, powder, etc.

 

Best of luck and enjoy.

 

MHO, YMMV, etc.

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The biggest problem I found with feeding is the chamber isn't a full auto chamber on the kahr barrels .

It really really likes that nice loose chamber on the fa barrels in a semi gun.

My tm1 was a jamo matic with the kahr barrel. Swapped it to a numrich full auto 10.5 inch barrel and it's a singer sewing machine now

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