Anytime I use a double base ball powder I use magnum primers. This is because these powders have more deterrent coatings and a hotter and longer burning primer helps.
CCI small rifle. IMR 4227. So far I've only run 125 gr. Speer TNT so can't speak to the subs or larger projectiles, but the recipe has been flawless and powerful.
I frequent the Outdoorsman and the last few times I've asked for small rifle primers, they've been out but have had Magnums. Considering finding a load I can use for plinking with them.
I am new to the group,but I have been using WSR primers with H110. Very good results. I have also tried CCI 450 magnums. I could not tell any difference.