Originally Posted by
Chill Wills
What you are describing is slip fit bullet seating.
Some of us like to use a little neck tension or pressure to grip the bullet. I seat them with match bullet seaters. My bullets are tight enough that not only do they not fall out, but you can not even pull them out of the case by hand.
Flashman - you seam pretty savvy to me. So, I do not doubt you in the least. Having said that; in my experience, having 0.003" neck tension on the bullet would not only hold place against any trapped, but would resist all efforts to move the bullet in the case unless by press or tools. I like to use about 0.001+ neck tension. Once seated, air and all, it is seated.
All, think about it. The bullet is the piston. The case is the cylinder. If you have a larger bullet than case neck, you will be compressing air every time. It does not take much neck tension to keep the bullet from popping up.
Flashman - I think there must be something else going on that you, and or, we don't know. I am not doubting you or your measurements, you sound like you have a GOOD handle on the facts, it is just that something else is present here you have not accounted for. I say this because, bullets with three thousands neck tension don't slip back out.
All the best - let me know what you come up with.
-Michael Rix