Pug, I do crimp 5.56.For some reason when the powder charge is almost half the weight of the bullet it makes sense. But Whispers and even the 458 SOCOM (405 grains) never slide up and I figured if the did they would stop at the rifling
?? Which when I load for my F-Class and Bench rifles is a good thing, even jammed into the rifling up .050. I learn somethin' almost every day
if I stay awake.