Thanks, Unclenick!! I will look into faster powders.
In the meantime, should I seat the bullet deeper (it honestly can't be seated more than 5mm/1/4") in the case, or up the powder charge?
I may as well use the powder I have and find a good charge for it in the mean time
What I'm dreading now is opening up 160 cases with a bullet puller!!
You cannot wake someone who is pretending to sleep. Stop pretending. Wake up.
Doubt: ...it's the only thing I'm sure of...
-Marsupials: Nature's idea of Concealed-Carry-