I've seen this post before,but couldn't seem to find it with the forum search. Anyway with the help from Quick I was able to get the 45/70 barrel fitted to my frame. Now it wont cock. Tried backing off the stock screw, nothing. Any ideas? The barrel latches nicely with what seems to be the right amount of play in the release. I gave my original barrel back to the gunsmith to get a dovetail for a front sight cut, so I can't try that one on for a test.