17,
Consider running a few of these by a velocity measuring device?
Are you chambering loaded rounds also, or just the brass after it comes out of the die?
If you get the chance, run a couple set up to your current .10-.15 off the lands loads, then try a couple seated to Speers recommended COAL and see if there is a difference in velocity.
Can you please comment on why you remove the firing pin for testing? I have several M70's, and have never done that.
What primers are you using?
I am still waiting for the day i blow a primer out. I would be very unhappy, if that happened to a 2 dollar piece of brass.
