Are you getting best accuracy with magnum or stardard large rifle primers?

After some tests, Winchester LR (standard) primers are giving me the best results. They seem to be between the hottest of standard primers

In my rifle, (Model 70 Super Shadow) the preferred primer is the standard Federal 210, with the Winchester Magnum right behind. Least favored has been the Federal 215 Magnum.

I also shoot a Super Shadow and it likes the Fed 210M. Good shooting.

My 270WSM reloads use the Federal 215 Mag primers for my Tikka T3 LS rifles.

did some reloads for my friends 1885 270 wsm and used winchester wlrm primers, they worked wonderful with w-w brass , magpro powder, and speers 130 bts. one muledeer (3pt) two antolope does,two coyotes,one whitetail buck 9 or 10 point, and 2 does,all bang flop drt,one ausome rifle/caliber combo to be sure! regards

6 270 WSM's, all slightly different loads, and Mag primers for all for me.

Good Shooting--Don