KentG Posted April 20, 2015 Share Posted April 20, 2015 Anyone use CCI small rifle primers for 9mm minor reloads? I have used Winchester SRP but want to standardize for 223 and 9mm and CCI SRP is first choice. Link to comment Share on other sites More sharing options...
Alaskapopo Posted April 20, 2015 Share Posted April 20, 2015 Be fine except for striker fired guns with trigger jobs Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted April 20, 2015 Share Posted April 20, 2015 I just read a posting called "9mm major Topics", and pitvpr reports problems using small rifle primers in his 9mm Major - not sure if same problem would exist in 9mm Minor. Link to comment Share on other sites More sharing options...
Steve RA Posted April 20, 2015 Share Posted April 20, 2015 I use Tula KVB-556m in 9 and SP .45 at what would be comfortable major and minor velocities (130 PF in 9 and 168 PF in .45) and have no marking on either breech face that would indicate any gas leakage past the primers. Link to comment Share on other sites More sharing options...
darkvibe Posted April 20, 2015 Share Posted April 20, 2015 It's my understanding, and I have no way to confirm this without asking CCI, that CCI SRPs have harder cups than SPPs. With lighter loads the pressure might not seal the primer in the primer pocket and gas can leak around the primer causing breach face erosion. Like I said, I can't confirm how hard the primer cups are but it's worth at least thinking about. Link to comment Share on other sites More sharing options...
Pasley Posted April 20, 2015 Share Posted April 20, 2015 I've used a bunch of CCI small rifle primers in my stock Glocks with no problem. Link to comment Share on other sites More sharing options...
kneelingatlas Posted April 20, 2015 Share Posted April 20, 2015 Come on darkvibe, that's not very sciency of you . There are plenty of ways to determine how hard they are, how about weighting them? measuring them? melting them down and analyzing the metal? If you're not interested enough to look into it just say so, but to say there's just no other way is a disservice to rational empiricism. I'll admit I've heard enough anecdotal evidence to be curious, but as I load 9 major with Winchester SPP and have never had issues with breach face erosion or light strikes, my motivation is low. Link to comment Share on other sites More sharing options...
RDA Posted April 20, 2015 Share Posted April 20, 2015 Come on darkvibe, that's not very sciency of you . There are plenty of ways to determine how hard they are, how about weighting them? measuring them? melting them down and analyzing the metal? Or you could just look at the thickness of the cup (0.017" for SPP and 0.020" for SRP) and figure that it would be silly for CCI to make an 18% thicker cup but make the alloy softer so that the net result is that the SRP is equal to or softer than the SPP. I'd bet that all CCI primers use basically the same alloy and the cup thickness determines the cup hardness. Link to comment Share on other sites More sharing options...
dee loo Posted April 20, 2015 Share Posted April 20, 2015 I've reads on here correspondence with atk confirming that cci magnum spp and cci small rifle (400) are the same, they have a 0.20 thickness cups, cci also makes another srp the 450 that has a 0.25 cup that is better for ar's to prevent slamfires. Link to comment Share on other sites More sharing options...
sg1911 Posted April 22, 2015 Share Posted April 22, 2015 CCI 400 and, RP 61/2 have a thickness of .020. WSP primers have a thickness of .021. None of these primers are recommended for use in AR'S as they may be pierced with AR loads. Best to use Mag SR or beanchrest primers. I was unaware of this when I purchesed my srp so have been using them in my sp loads with no problems. Link to comment Share on other sites More sharing options...
bowenbuilt Posted April 23, 2015 Share Posted April 23, 2015 I have some CCI BR4's SRP that I believe are made out of tungsten diamond plate. They are harder than the hinges of hell! Don't buy them for your Glock! Link to comment Share on other sites More sharing options...
gng4life Posted April 23, 2015 Share Posted April 23, 2015 KentG, I just wouldn't do it...I would just stock two correct primers for their applications instead of trying to compromise in the middle and stay with one. I shoot 9Major mostly and found out that CCI SPP works fine in there and in my Minor loads so I was happy that I did not have to stock different primers but you're in a little different situation. There is just a large gap you would have to fill and with primers being readily available, it isn't a supply thing. Link to comment Share on other sites More sharing options...
darkvibe Posted April 23, 2015 Share Posted April 23, 2015 Come on darkvibe, that's not very sciency of you . There are plenty of ways to determine how hard they are, how about weighting them? measuring them? melting them down and analyzing the metal? If you're not interested enough to look into it just say so, but to say there's just no other way is a disservice to rational empiricism. I'll admit I've heard enough anecdotal evidence to be curious, but as I load 9 major with Winchester SPP and have never had issues with breach face erosion or light strikes, my motivation is low. I'm not interested enough to look into it. Thicker probably means harder but i dont want to speak with any certainty since its not definite. Only CCI could say with 100% certainty. I do think it's worth looking into before using them. Link to comment Share on other sites More sharing options...
Aric Posted April 26, 2015 Share Posted April 26, 2015 Will a small rifle primer with a minor load cause breach face erosion? Link to comment Share on other sites More sharing options...
Steve RA Posted April 26, 2015 Share Posted April 26, 2015 My experience says no, others say yes. I personally think the hardness of metal in the slide has as much to do with it as the primers. Link to comment Share on other sites More sharing options...
jcc7x7 Posted April 27, 2015 Share Posted April 27, 2015 Shoot'm Link to comment Share on other sites More sharing options...
kneelingatlas Posted April 27, 2015 Share Posted April 27, 2015 Just internet hearsay, but it makes sense: http://thefiringline.com/forums/archive/index.php?t-417220.html Link to comment Share on other sites More sharing options...
Aric Posted May 2, 2015 Share Posted May 2, 2015 Should be safe with Federal small rifle primers? Link to comment Share on other sites More sharing options...
SteveU Posted May 2, 2015 Share Posted May 2, 2015 I use CCI SRP for 9mm minor, 9mm major, 40 minor, 40 major, and .223. Link to comment Share on other sites More sharing options...
photoracer Posted May 8, 2015 Share Posted May 8, 2015 I have used CCI SRP in 9x23 for years, even for loads down around 125 PF for my Bul M-5 Limited gun. Or at 175 PF using AutoComp behind a 124g Ranier plated FMJ in my STI. I also use Wolf and Tula SRP without much fuss either. I won't use Federal primers simply because I use a Lee press and they don't recommend them. Link to comment Share on other sites More sharing options...
johnbu Posted May 10, 2015 Share Posted May 10, 2015 (edited) Come on darkvibe, that's not very sciency of you . There are plenty of ways to determine how hard they are, how about weighting them? measuring them? melting them down and analyzing the metal? If you're not interested enough to look into it just say so, but to say there's just no other way is a disservice to rational empiricism. I'll admit I've heard enough anecdotal evidence to be curious, but as I load 9 major with Winchester SPP and have never had issues with breach face erosion or light strikes, my motivation is low. I'm not interested enough to look into it. Thicker probably means harder but i dont want to speak with any certainty since its not definite. Only CCI could say with 100% certainty. I do think it's worth looking into before using them. From wiki As flexural rigidity of the plate is determined by the Young's modulus, Poisson's ratio and cube of the plate's elastic thickness, it is a governing factor in both (1) and (2). Flexural Rigidity[1] D = \dfrac{Eh_e^3}{12(1-\nu^2)} E = Young's Modulus h_e = elastic thickness (~1015 km) \nu = Poisson's Ratio So flexural rigidity is impacted as the cube of the thickness. So a few thousanths makes is much more stiff. Ie, difficult to set off. Edited May 10, 2015 by johnbu Link to comment Share on other sites More sharing options...
R BROWN Posted May 16, 2015 Share Posted May 16, 2015 I have not had any problem with breach face erosion and hard primers yet. This may help some, take it for what it's worth. http://www.accurateshooter.com/technical-articles/primers-and-pressure-analysis/ http://www.sksboards.com/smf/index.php?topic=56422.0 http://www.sksboards.com/smf/index.php?topic=56422.0;wap2 http://www.shootingtimes.com/ammo/ammunition_st_mamotaip_200909/ http://www.leverguns.com/articles/johnk/primertest.htm http://riflemansjournal.blogspot.com/2009/06/primers-small-rifle-primer-study.html http://riflemansjournal.blogspot.com/2009/06/primers-large-rifle-primer-study.html Link to comment Share on other sites More sharing options...
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