It's a 1:48 twist.

Was shooting the 370 Maxi. 65 -80 grns of powder.

I'm having trouble with PRB accuracy and my patches keep getting blow to bits. I've tried several different patches with different lubes.

It is a barrel that I saved ( or at least thought I saved ) from the rust heap. It looks pretty good now if I don't say so myself.

I was thinking of giving up on the PRB's but perhaps I can make another run at them.