I have 2 contender frames (high 300K, low 400K) and 2 14" barrels (222 and 35 Rem). Everything interchanges with each other. I bought a 50 cal Contender MZ bbl. It will not close on either frame. Looking at the barrels, the only difference is that the MZ bbl has a pin sticking down from the bottom lug. It hits (I think) the sear and prevents closing. Don't understand why the pin is there. Any reason I can't remove it to get the rifle to close and lock ? Thanks!
Oops, now it's looking like the MZ bbl only works on the G2 and that pin is called a "barrel lug stop". So what's the deal ? The frames I have lock up without any need for the pin with the barrels that have no pin.
As BP pressure is far lover, I can't imagine the MZ would be unsafe on the earlier frame.