rodman4951 Posted October 7, 2022 Share Posted October 7, 2022 Is there anyone having 9 mm brass sizing issues? Before this gets to crazy let me explain. I have been reloading for many years I have been shooting open and switched to minor for a break. I am having problems with my 124 RMR JHP falling into the case before get a chance to seat them. I am loading on 1050s, I tumble and dry my brass, pre lube before sizing, using dillion sizing die, MR bullet feeder funnel expander die set at outside flare is .377 .378 just enough for the bullet not to fall off before seating, and finally Mighty taper crimp. I know that 9s are tapered my inside is is roughly .352 .353. My bullets are .355. A lot of the loaded bullets fall out when I case gage them. Also I can push them back with very little force. I am using the same set up with my open ammo and no issues. My main concern is bullet set back and having a blow up. Link to comment Share on other sites More sharing options...
Nathanb Posted October 7, 2022 Share Posted October 7, 2022 That’s not the brass issue. It’s an issue with your mighty armory dies. Link to comment Share on other sites More sharing options...
rooster Posted October 8, 2022 Share Posted October 8, 2022 12 hours ago, Nathanb said: That’s not the brass issue. It’s an issue with your mighty armory dies. This Link to comment Share on other sites More sharing options...
Miranda Posted October 8, 2022 Share Posted October 8, 2022 (edited) yeah, of the items you mention, the only way to get those results is the crimp is sizing the case with the bullet in place that 'sizing' is also sizing the bullet. with lead plated or coated bullets, that action will make the bullets loose. most jacketed will stay, because the jacket are similar to the case walls all that said, I am pretty sure jacketed bullets can be sized and become loose. miranda Edited October 8, 2022 by Miranda typo... Link to comment Share on other sites More sharing options...
Sarge Posted October 8, 2022 Share Posted October 8, 2022 My money would be on the sizing die not being low enough or being junk. Only time I get bullets that loose is in unsized brass. Also, my rounds are crimped to .378. Link to comment Share on other sites More sharing options...
open17 Posted October 8, 2022 Share Posted October 8, 2022 Crimp could be part of it, but this indicates it's a sizing or powder funnel/expander issue: " I am having problems with my 124 RMR JHP falling into the case before get a chance to seat them." Link to comment Share on other sites More sharing options...
rodman4951 Posted October 10, 2022 Author Share Posted October 10, 2022 Kevin I have the sizing die all the way down to the shell plate. Link to comment Share on other sites More sharing options...
rodman4951 Posted October 10, 2022 Author Share Posted October 10, 2022 Well here is what I found out the reason I am not having issues with 9 major with the same bullet is I am not seating them in as deep 1.170. The minor bullets I am setting the 1.120. So I measured up form the base .050 and there is a taper in the bullet .002. And since the 9mm case is tapered the and now the bullet is tapered instead of being .355 it is .353,. 354 that is my issues. It took me a while but thanks for all the input trying to help. Link to comment Share on other sites More sharing options...
Miranda Posted October 12, 2022 Share Posted October 12, 2022 (edited) ummmm.... from a bunch of measuring cases... most 9mm cases have tapered walls they get thicker as they go to base. so yes there is a taper on the outside, from what I can measure, after about .3 inches the casewalls will get enough thicker that the interior is also tapered similar to the outside. to kick this a bit harder, from what I have tried about a half inch into the case the bullet will stop because of the thickness of the walls. that is far enough to be a 'setback' problem... so... sizing/decapping dies should make the bullet very hard to seat, the expander should create the room for the bullet AND a bell. the crimp should just remove the bell. the crimp should not touch the rest of the case except the bell. if your bullets fall out? you have something 'sizing' the bullets. You have resized bullets and I am not certain how you got them. buuuuuut I suspect your crimp die... as the item that brought all the mistakes into one place and tried to crimp them all... also known as a loose bullet. miranda Edited October 12, 2022 by Miranda /decapper... Link to comment Share on other sites More sharing options...
delta6 Posted January 23, 2023 Share Posted January 23, 2023 Too much bell?? of the case mouth?? Link to comment Share on other sites More sharing options...
Miranda Posted February 3, 2023 Share Posted February 3, 2023 On 1/23/2023 at 7:15 AM, delta6 said: Too much bell?? of the case mouth?? hi delta6, not sure how I missed your post. the case mouth is belled to make seating the bullets easier. the 9mm round has no bell at the case mouth when it is done. while is is hard to say you have too much bell prior to seating the bullet... 'Tis easy to say this: any bell, any bell, is too much bell for a finished round. miranda Link to comment Share on other sites More sharing options...
shred Posted February 4, 2023 Share Posted February 4, 2023 Usually it's insufficient sizing that lets bullets push straight in. Sometimes it can also be caused by oversize powder funnels with straight-sections below the flare or on 1050-type presses the swage backup rod is expanding cases too much or too deeply. Link to comment Share on other sites More sharing options...
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