Originally Posted By: varminter .223Seater plug leaves a ring in the bullet. Seems like friction between bullet and case is so great that the rigidity of the bullet is not great enough to with stand seater plug pressure without deforming. This in and of itself is not uncommon. Seater plugs cannot fit all ogives perfectly and mark bullets they do not fit properly.
If I adjust the seater plug down more the bullet deforms more and the shoulder to body junction buldged.
No clue how to put a pic up.
Do they look like the pictures
I posted here?
More details in link above.
I could sure be wrong...won't be the first time and absolutely sure it won't be the last and I'm not saying neck tension cannot be the problem but in 65 years of reloading, I have never had that problem and the issues you describe fits a crimp problem perfectly (bulged case @ shoulder to case junction, need to readjust seating plug deeper than with your old cases.
Irregardless of the fact your seating die is adjusted per mfg. instructions, and the new cases are not over max length, case length matters when crimping....(slightly) longer cases will crimp more than shorter ones.
The reason I questioned sizing new brass, especially with a small base die, is:
1) This will tend to lengthen the cases. (measure case length before and after running through sizer). I also see that you did not lube inside case necks so assume they were not lubed before running through sizer. This can exacerbate the case length problem by pulling the shoulder sufficiently to "stretch" the case even more as the dry plug is extracted.
2) The fact that you needed to reset your seater plug on the new brass, I believe, is that the case springs back where you have compressed your shoulder, making OAL a few thousandths longer.
It is easy to prove/disprove my theory. Try backing your seating die out at least one turn (don't worry about OAL on this round yet. Did it buckle shoulder? If not, re-adjust seater die by screwing it down on an empty, sized case which is trimmed to proper length until you feel it touch the die....that will be the crimp ring touching case neck, then back off (I usually back off at least 1/2 turn). Set you'r lock ring and adjust the seater plug to seat the partially seated bullet above to desired OAL. If I'm correct, that should solve the problem.
Brass measured the same other than some inconsistency in brass thickness of the necks on someone of the multi time fired stuff which loads perfect. Its like the brass isn't giving to allow the bullet to seat in. When I load without sizing maybe 10% had this issue. Kind of odd. [/color]
Regards,
hm