The2aguy Posted January 6, 2018 Share Posted January 6, 2018 ACME 115gr 9mm RN bullets Length .530x .356 I ran a plunk test and determined I had to run a max of 1.058 to spin Doing a ladder work up I decided 4.2 grains was ideal for me @ 1115 avg from a Glock 17 Firing up the progressive I find 10-20 out of 100 don’t plunk until 1.040 Does anyone load THAT short? 1.030-1.040 Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted January 6, 2018 Share Posted January 6, 2018 28 minutes ago, The2aguy said: Does anyone load THAT short? 1.030-1.040 If you have to, you have to .... Link to comment Share on other sites More sharing options...
kneelingatlas Posted January 6, 2018 Share Posted January 6, 2018 If it needs, what's the problem? Link to comment Share on other sites More sharing options...
olstyn Posted January 6, 2018 Share Posted January 6, 2018 OP, what gun? I had a similar experience with Acme 124 gr round nose and my Walther P99 (for loading purposes, basically identical to a 4" PPQ). They wouldn't plunk/spin consistently above 1.04" OAL, so I probably will have had to load them at 1.035" to account for variations in length with a progressive press. I think Acme's round nose profile isn't very friendly to guns with short/tight chambers. I've still got a stock of other bullets that I can load much longer with a known recipe, so I haven't done anything beyond determining OAL with the Acmes yet. I'll be curious to know how the 115s work out for you, as I'm a bit leery of loading that short, too. I'm worried that pressure will get too high before I can get them to make minor, especially given that my preferred powder is on the fast end of the spectrum (VV N320). I've also got about 1/3 or 1/2 pound of Unique hanging around, and almost a full pound of CFE Pistol. Those are both slower, so probably safer, but I've been hesitant to mess around with loading that short anyway. Link to comment Share on other sites More sharing options...
olstyn Posted January 6, 2018 Share Posted January 6, 2018 Er, nevermind on the gun. Dunno how I missed that it was a G17. I guess I'm used to people reporting on being able to load fairly long in Glocks, so that detail just flew right past without sticking in my mind. Link to comment Share on other sites More sharing options...
The2aguy Posted January 6, 2018 Author Share Posted January 6, 2018 The gen 5 throats are ridiculously short My minds saying the 115gr bullets shorter so seating deeper will just have the same effect as seating 124gr a bit longer Ran up to 4.6gr @ 1.055 and didn’t see pressure signs but I set that as a bit hot for me as it avg 1204 from the 17 Cfe pistol I found a requirement to run near max..never tried unique Will going from 1.055 to 1.030 be a major jump in pressure? Quickload showed 28,000 to 29,500 psi jump 1.030 depth puts 0.25” of the bullet in the case..I also wonder if with a shorter bullet seating deeper may be idealSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
olstyn Posted January 6, 2018 Share Posted January 6, 2018 33 minutes ago, The2aguy said: The gen 5 throats are ridiculously short In that case, welcome to the CZ/Walther world. I've never been able to load Montana Gold 124 gr JHPs any longer than 1.08", and one of my guns is happier with them at 1.075". I can't say whether Quickload is giving you accurate pressure information there, but the relationship between OAL and pressure is not always linear, so be careful; at some point it may spike quickly. 29,500 is well under SAAMI max for 9mm, though, so if Quickload can be trusted, you're probably ok. Link to comment Share on other sites More sharing options...
9x45 Posted January 6, 2018 Share Posted January 6, 2018 I used to run Bear Creek RN at 1.060" Glocks cannot be loaded to more than 1.180" because they will not feed thru the magazine. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted January 6, 2018 Share Posted January 6, 2018 (edited) 12 hours ago, The2aguy said: ACME 115gr 9mm RN Quote Does anyone load THAT short? 1.030-1.040 If you’re this displeased - and disconcerted - by loading this short? Grab a 100rd sample pack of a 125gr truncated cone from blue bullets or black bullets international, and see what kind of length you can get. An M&P that needed Acme’s 124 RN to be about 1.110” would feed a bullet with a TC profile flawlessly at 1.150” Bullet shape really, really matters. Far more than weight. Edited January 6, 2018 by MemphisMechanic Link to comment Share on other sites More sharing options...
9x45 Posted January 6, 2018 Share Posted January 6, 2018 OAL is just for feeding, bullet shape and length affects pressure (ie same weight bullet, TC and RN, will have not only have different OALs, but case volumes as well) Link to comment Share on other sites More sharing options...
IDescribe Posted January 7, 2018 Share Posted January 7, 2018 On 1/6/2018 at 11:06 AM, MemphisMechanic said: Bullet shape really, really matters. Far more than weight. ^^^This^^^ Sit back and picture what's happening. Just a hair forward of the shoulder of the bullet, on the ogive/cone, there is the place on the bullet that makes first contact with the rifling, and loading to an OAL that keeps that spot just short of rifling contact is your max OAL where the cartidge will plunk and spin freely. Right? So your actual max OAL is all about how much bullet there is FORWARD from that point. Or in other words, how much bullet there is that never makes contact with the gun and isn't sunk into the case. If your max OAL is short, it's because the front of the bullet is stubby. That's it. It DOES mean it's going to seat a LITTLE bit deeper, but not by the same amount as OAL varies. If one bullet's max OAL is 1.160, and a different bullet's OAL is 1.060, that doesn't mean the bullet is seated .100 deeper into the case. It might only be .05 deeper, or .04, or whatever. It's not as big a deal as it seems. As someone already said, if it feed, it feeds. Link to comment Share on other sites More sharing options...
IDescribe Posted January 7, 2018 Share Posted January 7, 2018 Also, though, clean out your chamber with a brass brush and some solvent. Make sure you don't have something in there making contact early. Link to comment Share on other sites More sharing options...
tcp112275 Posted January 8, 2018 Share Posted January 8, 2018 ACME 115gr 9mm RN bullets Length .530x .356 I ran a plunk test and determined I had to run a max of 1.058 to spin Doing a ladder work up I decided 4.2 grains was ideal for me @ 1115 avg from a Glock 17 Firing up the progressive I find 10-20 out of 100 don’t plunk until 1.040 Does anyone load THAT short? 1.030-1.040 Sent from my iPhone using TapatalkWith ACME 9mm 122 g FP I load to 1.04 in my CZ SP-01. Just make sure you start low and work up to where u are looking to go. Freaked out at first but they shoot good for me once I found the ideal charge weight. Link to comment Share on other sites More sharing options...
The2aguy Posted January 8, 2018 Author Share Posted January 8, 2018 4.2 hp38 @ 1.050 was ideal for meGoing to try 4.0 @ 1.035 next run and see if they still make PF Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Bolts Posted December 13, 2020 Share Posted December 13, 2020 Hello reloaders I have a Glock 19 Gen 5. I loaded Acme 9mm 115 gr RN bullets at 1.123. To long. I had feeding and battery issues and a few seize ups. I did plunk test and found I needed to go down to 1.068 before I could plunk and spin. Seems to be the same for my Sig p320 compact. I am using 4.0 gr of Sport Pistol and cci 500 primers. Anyone do this same recipe or similar? Link to comment Share on other sites More sharing options...
N7VY Posted December 24, 2020 Share Posted December 24, 2020 I have a Tanfoglio Stock2 that I load with sns 125g 9mm bullet and I have to have the length at 1.06” using 4.0g of sport pistol. This load works at 137pf that has been chronographed. I use this load in all of my other 9mm pistols and pcc. Don’t have to worry if this is the right round for the particular weapon. Link to comment Share on other sites More sharing options...
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