chase214 Posted March 25, 2015 Share Posted March 25, 2015 I'm looking for load data for 9mm 2011 open pistol using autocomp. Iv read that some people use small rifle primers in their 9 major loads what does that do for the loads. I understand pistols differ in barrel length,comps ect I'm just want a good starting point Link to comment Share on other sites More sharing options...
Sarge Posted March 25, 2015 Share Posted March 25, 2015 Small rifle primers withstand the high pressures better. I have loaded MG 121's with 7.4 WAC @1.168 for 174 PF and MG 115 JHP with 7.8 same oal and got same PF Both loads out of Cheely 5" Open w/ no holes Link to comment Share on other sites More sharing options...
BASE772 Posted March 25, 2015 Share Posted March 25, 2015 7.2 of AutoConp under a MG 124 CMJ @ 1.180 OAL gives me a consistent 169 PF out of a Blackdog Gunworks 2011 5". KKM barrel with Cheely comp and no holes. Link to comment Share on other sites More sharing options...
gng4life Posted March 25, 2015 Share Posted March 25, 2015 (edited) The rifle primers burn a little hotter to help with burning and they are a little tougher to withstand higher pressures. I have used SPP for years now without issue so I don't see a need for it. Also, there was some info floating around one time about that the rifle primers were causing premature breach face erosion but that was never confirmed I don't think. My load is 8.3 HS6, MG 124 JHP, CCI SPP, mixed brass, OAL - 1.150, 172 PF out of a KKM 5.4" barrel with a CFD comp in a 2011 platform. Sorry, just remember you said WAC. I used 7.6 of WAC for 170 PF in a Trubore, didn't run it in my current setup. Edited March 25, 2015 by gng4life Link to comment Share on other sites More sharing options...
ChuckS Posted March 25, 2015 Share Posted March 25, 2015 The rifle primers burn a little hotter to help with burning and they are a little tougher to withstand higher pressures. I have used SPP for years now without issue so I don't see a need for it. Also, there was some info floating around one time about that the rifle primers were causing premature breach face erosion but that was never confirmed I don't think. My load is 8.3 HS6, MG 124 JHP, CCI SPP, mixed brass, OAL - 1.150, 172 PF out of a KKM 5.4" barrel with a CFD comp in a 2011 platform. Sorry, just remember you said WAC. I used 7.6 of WAC for 170 PF in a Trubore, didn't run it in my current setup. I saw the breech face erosion in a friends major 9 open gun. He went back to SPP and all was well. I don't remember what powder he was using but he was clocking in the low 170's. Later, Chuck Link to comment Share on other sites More sharing options...
kneelingatlas Posted March 25, 2015 Share Posted March 25, 2015 I started with SRP 'cause it's what everyone else does', then switched to SPP, have yet to see a primer fail, and my breech face looks like new Link to comment Share on other sites More sharing options...
chuck s Posted March 25, 2015 Share Posted March 25, 2015 Spp here with 7.2 gr autocomp and extreme 124 hp. No issues Link to comment Share on other sites More sharing options...
chase214 Posted March 25, 2015 Author Share Posted March 25, 2015 Would I need to bump up the powder if I have holes in the barrel and a comp Link to comment Share on other sites More sharing options...
gng4life Posted March 25, 2015 Share Posted March 25, 2015 Would I need to bump up the powder if I have holes in the barrel and a comp More than likely, yes. I stopped putting holes in mine since I had to bump the powder up from .2-.5 to get the same PF. It all depends on your barrels, size of holes, how many, etc. Always START LOW and work up slow using a chrono - watch for pressure signs. Do not use the exact recipes we list since every barrel and setup is different. Link to comment Share on other sites More sharing options...
chase214 Posted March 25, 2015 Author Share Posted March 25, 2015 Yea I didn't plan on it just wanted a good starting point to work up to and sense I have to drive almost an hr to the range. Link to comment Share on other sites More sharing options...
accu9 Posted March 26, 2015 Share Posted March 26, 2015 Somebody mentioned Small Rifle Primers burn hotter than Small Pistol Primers. This is not the case. Small Rifle primers have a thicker cup (able to withstand more pressure), but the compound/ amount of compound used is identical to Small Pistol Primers. Don't believe me? Check with Guy Neill who writes a reloading column in USPSA's Front Sight magazine. Link to comment Share on other sites More sharing options...
kneelingatlas Posted March 26, 2015 Share Posted March 26, 2015 Yea I didn't plan on it just wanted a good starting point to work up to and sense I have to drive almost an hr to the range. What does your gun look like? barrel length? holes in the barrel? what weight bullets? Link to comment Share on other sites More sharing options...
chase214 Posted March 28, 2015 Author Share Posted March 28, 2015 5 inch 3 holes in barrel one on top and one on each side with comp it's an akai I was planning on 124 extream hp Link to comment Share on other sites More sharing options...
chase214 Posted March 28, 2015 Author Share Posted March 28, 2015 I'm new to the open side of the house so any help will greatly be appreciated Link to comment Share on other sites More sharing options...
kneelingatlas Posted March 28, 2015 Share Posted March 28, 2015 I suspect you'll end up in the 7.8-8gr range. Link to comment Share on other sites More sharing options...
mscott Posted March 30, 2015 Share Posted March 30, 2015 I just got a new to me Open gun, so had to load up some major ammo. Gun is an older STI TruBore with a shorter comp than what's used now. Came up with: 124 MG JHP 7.0 of Auto Comp 1.165 oal. 170pf at 40 degrees outside. Not sure what this powder does with changing temperatures. Link to comment Share on other sites More sharing options...
chase214 Posted March 30, 2015 Author Share Posted March 30, 2015 I don't wanna sound like an idiot but I'm gonna be seating the bullet on the powder correct(compressed load) Link to comment Share on other sites More sharing options...
Sarge Posted March 30, 2015 Share Posted March 30, 2015 I don't wanna sound like an idiot but I'm gonna be seating the bullet on the powder correct(compressed load) Probably not AC doesn't take up much room in the case.I run 7.8 with a 115 and it's not down to the powder yet at 1.168 Link to comment Share on other sites More sharing options...
truborshooter Posted March 30, 2015 Share Posted March 30, 2015 To check if a compression load take a fired case with a fired primer still in, drop powder load into case, hand fit a new bullet, fired case should allow a loose slip fit on the bullet, measure oal with bullet compressing powder, compare oal to your load specs oal. Link to comment Share on other sites More sharing options...
mscott Posted March 31, 2015 Share Posted March 31, 2015 I don't wanna sound like an idiot but I'm gonna be seating the bullet on the powder correct(compressed load) Compressed loads aren't necessarily anything to be scared of as long as you are using a proven powder and have a clue to what you are doing. I'm not sure if my AC load was compressed or not, but it is certainly close. Compressed loads aren't uncommon at all in rifles. Link to comment Share on other sites More sharing options...
kneelingatlas Posted March 31, 2015 Share Posted March 31, 2015 I load 9.5gr of SP2 in 9mm, so yeah, you can compress the powder Link to comment Share on other sites More sharing options...
blueeyedme Posted March 31, 2015 Share Posted March 31, 2015 Win SMP, MG 121 IFP, 7.5gr WAC, 1.168 - consistent 176pf and works my comp very well. No ppl holes. Link to comment Share on other sites More sharing options...
chase214 Posted April 1, 2015 Author Share Posted April 1, 2015 I appreciate for all the input Link to comment Share on other sites More sharing options...
Parallax3D Posted May 4, 2015 Share Posted May 4, 2015 Would I need to bump up the powder if I have holes in the barrel and a comp More than likely, yes. I stopped putting holes in mine since I had to bump the powder up from .2-.5 to get the same PF. It all depends on your barrels, size of holes, how many, etc. Always START LOW and work up slow using a chrono - watch for pressure signs. Do not use the exact recipes we list since every barrel and setup is different. Just chronoed my loads in my new CK Arms gun last Saturday. 124gr MG CMJ, 7.2 gr WAC, 1.170 OAL, SRP. In my old gun, (Schumann barrel, 6 port comp), I was getting 172-173 PF. In the new gun, (KKM barrel, Cheely 4 port comp, 3 popple holes), it seems to be making the same numbers. I was consistently in the 1390-1400fps range, I was rather surprised myself, since I was expecting to need more powder. Bottom line, you pretty much need to do the chrono work. Link to comment Share on other sites More sharing options...
Bkreutz Posted May 4, 2015 Share Posted May 4, 2015 I load 6.8gr AC under a 124 plated RN, I chrono right at 1400 fps out of a 5" barrel, no holes, 4 port comp. (1.165 OAL) Link to comment Share on other sites More sharing options...
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