bowhunter42
Well-Known Member
I was doing some loading for a botw cooper rifle that I had on loan in 300 win mag, and that bullet was doing 3025fps out of the 26" barrel. It was a very Hot load but as this rifle was not for a customer but rather it was Jim Sessions own rifle its was ok. I noticed after 2 or 3 loadings the primer pocket was getting loose and was starting to show extractor marks. I plan on starting 3 grains lower and working up slowly with different primers and such, If I can get in the 2980 to 3000 fps range I would be very happy as long as it groups well and my ES's are low. might even try some retumbo to see what i can get out of that powder. now If my new barrel would just get here.