[Texxut]

Thanks to 7.62X39, I've got my trunions installed and was ready to install the barrel today. Used some RCBS case lube, a brass 5/16" bolt and a big hammer. It started slow but went without too much force. My question is, just how tight should the "press fit" be? This didn't seem very tight at all. Will the pin hold the barrel in place? The pin took alot of force to set. This is a matching trunnion and barrel.

 

[Sangrun Hunter]

The pin holds the barrel in place and keeps it where it should be. Did you use a press? It was probably more force than one might realize to put that barrel in.

Also, did you take measurements of the barrel stub and the trunion before assembling? That would tell you how close it was in fit.

 

[Texxut]

I used a hammer and protected the muzzle with a brass bolt. Lubed the whole thing with RCBS case lube. I did not measure the barrel or trunion. The barrel came out of that trunnion. It's a matching kit.

 

[7.62x39]

The press fit seems to vary from as little as .001 to as much as .006.

Be sure to check your headspace even though it is a matching numbers kit.
Once the barrel comes out of the trunnion, all bets are off, as far as headspace goes.

Glad to hear you got the trunnions riveted OK.

 

[Sangrun Hunter]

I used a hammer and protected the muzzle with a brass bolt. Lubed the whole thing with RCBS case lube. I did not measure the barrel or trunion. The barrel came out of that trunnion. It's a matching kit.

Sounds like you did the same thing as I did. How many blows did it take to get the barrel back in? It took about 20 or better hards hits to send mine in. I had a tolerance of about .004 on my kit.

 

[Texxut]

10 hits, I think I'll tie it to a tire the first time I fire it.

 

[hcpookie]

You're fine with a matching kit. But do hold it at arm's length the first mag or two, "just in case". Can never be too safe!