I was under the impression that all I had to do to make 7mm Mag to 264 win mag was to resize it through the 264 sizing die and trim. So I made about 50 of them. Yesterday I got my 264 together and went to test fire it. I used 55.5 grains of 4350 to start, bout midway still 4 grains from max, I got a sticky bolt after the shot. No flattened primers or dimpled primers so I am thinking that I got the headspace right. I came back home and loaded up 3 more at 55 grains and still the sticky bolt. So I bought a box of Winchester 140 grain factory. They shot just fine. No sticky bolt!

So my question is what did I do wrong with my 7mm brass? The only thing that I see that is different between the two is the distance between the base of the case to the base of the neck. Is that causing me my problems. Or do I need to ream out the necks.

Ryan