bigarm Posted May 26, 2015 Share Posted May 26, 2015 The last 2 times I have been in Cabelas they have had magnum cci small pistol primers (and large for that matter), but no regular primers. Can I use the magnum primers and if so, do I need to drop charges any? Link to comment Share on other sites More sharing options...
TBeazlie Posted May 26, 2015 Share Posted May 26, 2015 In my G34 with LW barrel I get on average about 10 fps difference between CCI SP and SPM using 124 gr Blue Bullets. Link to comment Share on other sites More sharing options...
TBeazlie Posted May 26, 2015 Share Posted May 26, 2015 The only problem with the SPM was an occasional light strike. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted May 26, 2015 Share Posted May 26, 2015 I use them interchangeably ... Link to comment Share on other sites More sharing options...
ChuckS Posted May 26, 2015 Share Posted May 26, 2015 I used them during the 2008 shortage. I got some bolt face erosion in a open .40 gun. Later, Chuck Link to comment Share on other sites More sharing options...
mgrs Posted May 26, 2015 Share Posted May 26, 2015 I used them during the 2008 shortage. I got some bolt face erosion in a open .40 gun. Later, Chuck Yikes. I was using remington 6.5 rifle primers during the "madness" and must have gotten lucky. Link to comment Share on other sites More sharing options...
Aric Posted May 27, 2015 Share Posted May 27, 2015 I get more consistent velocities with SPM primers. They burn hotter longer. If I remember correctly, the are about 5-10fps faster than standard primers. Link to comment Share on other sites More sharing options...
Taroman Posted May 27, 2015 Share Posted May 27, 2015 (edited) Got a great deal on Federal SP Magnum Primers. Testing against Federal SP revealed some interesting results. Couldn't believe it, so repeated the test with essentially the same result: Low High Avg. ES SD 5/3/2015 LRN BAYOU 135 Bullseye 2.8 848.0 902.0 878.0 54.00 10.12 Federal SP 5/10/2015 LRN BAYOU 135 Bullseye 2.8 855.0 891.0 874.1 36.00 9.01 Federal SP Magnum This is my 9MM Steel Challenge revolver load. Runs my CZ 75B well, too. Edited May 27, 2015 by Taroman Link to comment Share on other sites More sharing options...
bigarm Posted May 28, 2015 Author Share Posted May 28, 2015 Got a great deal on Federal SP Magnum Primers. Testing against Federal SP revealed some interesting results. Couldn't believe it, so repeated the test with essentially the same result: Low High Avg. ES SD 5/3/2015 LRN BAYOU 135 Bullseye 2.8 848.0 902.0 878.0 54.00 10.12 Federal SP 5/10/2015 LRN BAYOU 135 Bullseye 2.8 855.0 891.0 874.1 36.00 9.01 Federal SP Magnum This is my 9MM Steel Challenge revolver load. Runs my CZ 75B well, too. Doesn't seem like much difference except a little smaller standard deviation and extreme spread. Link to comment Share on other sites More sharing options...
gunsablazin Posted June 1, 2015 Share Posted June 1, 2015 I use them in my .38spl loads, I have found with the small powder charges and large case capacity they give me much more uniform velocities. I am not talking about +P loads either, just standard pressure practice ammo. Link to comment Share on other sites More sharing options...
EkuJustice Posted June 2, 2015 Share Posted June 2, 2015 They are a little harder than standard small pistol primers and are pretty close if not the same as small rifle primers There have been people that have had breech face erosion using small rifle primers in light pistol loads that are low pressure and just don't seal around the primer due to being harder than small pistol primers. On higher pressure loads it seals up fine and usually 40 major is high enough to not be an issue as is 9major as they seal up and in the case of 9mm major do so without flattening out as much as the small pistol do. Link to comment Share on other sites More sharing options...
Traveler390 Posted July 25, 2020 Share Posted July 25, 2020 Has anyone used small mag primers in 9mm parabellum cartridges for a semi auto pistol? If so, what did you find for results?? Link to comment Share on other sites More sharing options...
AHI Posted July 25, 2020 Share Posted July 25, 2020 Upper right hand side of you screen that block that says search will reveal just the first 3 Link to comment Share on other sites More sharing options...
terrapin Posted July 25, 2020 Share Posted July 25, 2020 I’d have to assume that since he dredged up a post from 2015 he already used the search function or did a ton of scrolling.I occasionally need to substitute mag primers or small rifle primers. I don’t see any change with the benign loads I use in 9mm. If I was near the top of the pressure curve I would back off.There are rumors of bolt face erosion using the thicker mag and rifle primers caused by gas leakage. I have not experienced this.Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
4n2t0 Posted July 26, 2020 Share Posted July 26, 2020 Interchangeable. Link to comment Share on other sites More sharing options...
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