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Flaring and bullet seating depth problems

Posted: Mon Jan 16, 2017 5:32 pm
by Franky500
Im new at reloading
I have a loadmaster
I followed every instructions and videos on how to adjust the dies
When i put only one case in the shell holder everything is perfect but as soon as i have two of more case in, station 3 doesn't flare enough and station 4 doesn't seat the bullet deep enough and i know 0.010" is acceptable but i have up to 0.030" too long sometimes
Im reloading 9mm with 124 gr FP and c.o.a.l. Is supposed to be 1.050" so when i get between 1.050" and 1.054" with only one case in but with the shell holder full i get up to 1.080"
Is this an issue considering that the max c.o.a.l. for a 9mm is 1.169" or i shouldn't worry about it and what can i do to fix it?

Re: Flaring and bullet seating depth problems

Posted: Mon Jan 16, 2017 6:26 pm
by tcook
For starters, 1.169" is the max magazine length, but depending on the gun, the OAL has to be short enough not to jam the bullet into the rifling of the barrel. This varies for each gun (some may even take a longer OAL, but then it wouldn't fit in the mag).
The "plunk test" will determine workable OAL. Your 1.080 OAL could work as long as the cartridge doesn't get jammed in the barrel. The longer OAL should be safe, pressure-wise, as there is more room for the powder under the bullet. But, if the charge is too low, you could get a squib.

As for the varying OAL with all stations in use, it's caused by flex in the shell plate. It flexes more with only 1 piece of brass. Set up your dies with brass in all 5 stations, and you should be closer.

Re: Flaring and bullet seating depth problems

Posted: Mon Jan 16, 2017 8:14 pm
by Franky500
Thank you that is very helpful
I appreciate it alot

Re: Flaring and bullet seating depth problems

Posted: Mon Jan 16, 2017 8:39 pm
by tcook
No problem. Post your progress or any other questions you run into.

Re: Flaring and bullet seating depth problems

Posted: Wed Jan 18, 2017 5:57 pm
by DOC H
I got a question, I understand that hardly no one trims pistol cases, and that most brass I've found even after firing new ammo , that the brass is always on the short side of specs. Are the manufactures drawing the new brass shorter to save money? or what?

Re: Flaring and bullet seating depth problems

Posted: Thu Jan 19, 2017 12:14 am
by websterz
Lyman "M" dies are the way to go. I use them for 9mm, .40S&W and .45acp and the consistency of my rounds improved dramatically. I won't reload without them!

Re: Flaring and bullet seating depth problems

Posted: Wed Mar 01, 2017 8:36 pm
by R1200R
It seems if the cartridges ok single run Id look at my technique, are you running full stroke of the handle? Are all cartridges consistant at the 1.080"?