To tell you the truth, I am just to cheap to spend they extra money, and I am not a good enough shot to tell the difference, and I like the fact that the regular primers have a lower threshold of pain, IE start showing signs of pressure earlier, that's my signal that says OK Dean that's enough of that, cause that's where I draw the line, I never make it to sticky bolt status, I am far from reckless as some folks might think, or have they impression I am, due to my never ending quest for velocity, It's a fine line, but I rarely if ever cross it.

PS Mag primers also have a thicker skin, but I do not use them for another reason, they make faster burning powders spike high and hard, as far as pressure goes.

Tanks Dean