Cy Soto Posted February 27, 2008 Share Posted February 27, 2008 Folks, I have noticed that there is quite a bit of variation between the recommended OAL for a 9mm; most shooters are seating their 9mm Luger to 1.120" while most manuals recommend a maximum OAL of 1.169". I have settled on seating my 9mm reloads at 1.135" for no other reason than because the rounds seem to load consistently. Are there any reasons why I would want to seat my 124gr bullets any longer or shorter than my current depth of 1.135"? Am I missing out on any advantage on accuracy? Thanks! -Cy BTW, my current 9mm Luger load is: 4.7gr of WSF 124gr RN Berry's Plated Bullets WSP Primers Mixed headstamp brass OAL 1.135" Link to comment Share on other sites More sharing options...
yoshidaex Posted February 27, 2008 Share Posted February 27, 2008 what sort of gun are you shooting your reloads out of? My glock will get ammo loaded out to 1.130 oal since thats what it likes best. My STI/SVI open guns will get anything from 1.160 all the way out to 1.20 depending on the bullet i'm using at the time and the particular mags that go with the gun. Loading long helps with the feeding on S_I guns. I've heard loading long helps a bit especially if you have an ultra compressed load but I wouldn't know since I don't use any powder that will come close to compressed (HS6 user). Link to comment Share on other sites More sharing options...
Cy Soto Posted February 27, 2008 Author Share Posted February 27, 2008 what sort of gun are you shooting your reloads out of? I use the same load for both a G35 with an LWD conversion barrel and for a CZ SP-01; neither gun seems to have problems with this OAL. Link to comment Share on other sites More sharing options...
yoshidaex Posted February 27, 2008 Share Posted February 27, 2008 if it feeds fine, leave it and just keep on shooting. Link to comment Share on other sites More sharing options...
revchuck Posted February 27, 2008 Share Posted February 27, 2008 if it feeds fine, leave it and just keep on shooting. +1. The 1.169" OAL is the SAAMI max specification. Factory hardball runs ~1.15" OAL. Factory hollow point ammo usually runs somewhat shorter (~1.09-1.12). Link to comment Share on other sites More sharing options...
WestWorld Posted March 7, 2008 Share Posted March 7, 2008 I tend to determine my OAL by the bullets ogive/shape. Different shapes will contact the rifling sooner. A "fat" bullet loaded too long will hit the rifling before the the cartridge is fully seated in the chamber. A "skinny" bullet loaded short will have to jump from the cartridge to the rifling when fired. Sometimes this causes poor accuracy. My test is to load a bullet to a specific OAL, then drop it into the chamber, if the cartridge seats completely and cycles well, I call it good. Link to comment Share on other sites More sharing options...
Harmon Posted March 11, 2008 Share Posted March 11, 2008 if you want more accuracy, same length, just load a Hornady XTP....Mucho accurado! Link to comment Share on other sites More sharing options...
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