Curious, I dug around and discovered that the Old Boys like JOC shot those heavy charges of H4831 with CCI250's in the 270 Win...Mmmm.
I don't make a habit of using mag primers in standard cases, but I do when I load RL22 in the 270 Winchester.
BobNH -
YEP but I'd like to make 1 observation
CCI didn't change the mixture in the 250 primer till 1989. Post -JOC writing.
OTOH - it was in the 70-80s I was reading everything I could get my hands on per loading.
My GO-TO 270 load became 62grs 4831 (surplus) w/magnum primers.
That was UNTIL my primer testing---then I switched to WW (old-only 1 primer from WW) .
Even AFTER Win brought out their WLRMP they showed no diff from Win's older primers.
My point being -- WW's old primers were hotter than OTHER primers <<NOT counting Federals!!
I have YET to see Federal primers on a shelf where I bought/buy components. You can't test what you don't have.
Just an observation from my experience.
