I find very hard to believe that you have loose primer pockets on the 2nd firing. (unless is a very bad batch of brass?)
Maybe you need back out and start at 62 grains of powder instead of 65? check your velocity, sd and es and of course how well they group. Then 62.3, 62.5, 62.8, 63.1, 63.4, 63.7 and so on. Load 5 rounds of each load. Check every piece of brass after every firing and look for sings of pressure. If on a specific load you start to see sighs of pressure Stop rigth there! Write down all your info and choose the best load with the best sd, es and of course the best group.
If the brass wasn't fired on your rifle, I'll bump the shoulder 1 to 2 thousands and go from there. Don't forget to anneal your brass before rezising. Im sure some where in the 2900 to 3000 fps there is a happy recipe for your rifle and brass. Good luck and keep us posted.