My testing of mag primers in 270 gave no positive gains over Fed Match or WLR.
But that was me, my gun and the powders and bullets I use.
Now I am old enough that if it shoots good, I don't care to chase a couple fps.
Tim


"The significant problems we face cannot be solved at the same level of thinking we were at when we created them."
Albert Einstein

At Khe Sanh a sign read "For those who fight for it, life has a flavor the protected never knew".