The only issue I have ever had with loose primer pockets was in a 7mm remington mag shooting 140gr TTSX's with RL22 at max load with Federal brass. I could only get approx 3-4 loads out of the brass and it took no effort at all to seat the primer so I tossed the brass. You will know, the primers seated so easily in this brass I had to double check to make sure there was even a primer in there.
I use a hand primer