513T barrel
I bought one several years ago and was very displeased with it. After replacing the barrel and checking the head space, I was surprised to find it wouldn't shoot as good as the barrel I replaced. The one thing I never thought to check was the chamber, it was grossly oversize. I ended up sending the barrel back to Numerich and reinstalled the old barrel. I'll keep it the way it is and quit messing with it. This is only my experience and does not speak about Numerich arms, they treated me very well and I still buy from them.....Slim