BHBret Posted April 24, 2014 Share Posted April 24, 2014 I had a very similar issue with a Dillon 550B and Dillon dies loading 9mm with 124 MG JHP's. After various adjustment of dies and a lot of research online seeing other people with similar problems I went the recommended route of using a Redding competition seating die. I've had no issues with several hundred rounds. I check each loaded round in a Dillon gage after some of the earlier rounds (pre-Redding) really locked up my M&P. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
SPDGG Posted April 24, 2014 Share Posted April 24, 2014 (edited) fwiw: Like most, I use a lot of once fired 9mm range brass from various sources. See all sorts of fired case dimensions & its equal across the board, does not matter the manufacturer. I've had no issues using: Station 1: RCBS Carbide Sizing/Decap Die -&- Station 5: Lee FCD Here is an example w/ * Press: Hornady LNL & JACKETED Bullets *Measurements from Random Three: 1x Fired WIN 9mm Brass: * After RCBS Carbide FL Size/Decap: - Case OAL: 0.7450 - .7455 - Neck/Mouth: .3730 - .3735 - Case Base above Ext. Groove: .3880 / .3880 / .3875 * After PowderFunnel PTX Flare / Powder Drop: - Case Neck/Mouth: .388 to .3885 [Not the norm flare] ^ This has been backed out more, but its what I had it set to at the time. Using Jacketed bullets, & I flare just enough to top a bullet * After Redding Competition Bullet Seating Die: w/ Hornady 115 HAP: - Case Neck: .382 * After Lee FCD 9mm: - Case Neck: .377- .3775 - Case Base above Ext. Groove: .3865 - .3870 * Finished Round OAL: 1.075" _________________________________________________ Personal Preference but with Lead/Plated/Poly Coated: Case Prep w/ Clean-Lubed Cases - Size cases with the RCBS Carbide Sizing/Decap & Lee FCD or Lee U Die which sizes/decaps * I prefer this as I use either a Dillon Powder Check Die or RCBS Lock Out die in Station 3. Lyman M Case Expander drops into Station 1, Powder measure only drops no-flaring of case, lockout die, seating die, taper crimp die to remove case flare. * All my rounds fit in a case gauge, & drop in/out of Bar Sto & CZ 9mm chambered barrels nicely. Hope this helps Edited April 24, 2014 by SPDGG Link to comment Share on other sites More sharing options...
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