Tree Rat Posted July 15, 2004 Share Posted July 15, 2004 Other than masking pressure signs .......does one get a ballistic bump using rifle primers or are they energy equivalents to small pistol primers? TR Link to comment Share on other sites More sharing options...
SherlockWV Posted July 15, 2004 Share Posted July 15, 2004 I know that they (SRP) supposed to & I know a lot of shooters use them. I think the main reason is a more efficient burn of the powder used. I have read studies that say (tongue in cheek) that the difference is minimal when going to a SRP or Mag Primer. I have substituted Mag Primers and dropped the load 5% in Rifle with good accuracy results however the FPS did not change much. From what I have gathered so far, is that once a load is developed that satisfies ones need then stick with it. Also I think that it all is relative to the particular powder used. I have a friend who makes "Major" in 9mm (Open Class) & he uses straight SP Federal Primers with no pressure problems. Good & Safe Shooting - JC - Link to comment Share on other sites More sharing options...
Robert Snyder Posted July 15, 2004 Share Posted July 15, 2004 I use Federal Small Rifle primers in any high pressure loading that I load. The steel is a little stronger which helps avoid primer shearing and the possibility of blocking the firing pin. I have no comparison to give you as I would not use SP primers in such loads. I have heard that SRP burn a little slower thus giving a better burn but who know's I do know that in my 9mm Major using 115gr FMJ bullets I would not trust any other primer. Link to comment Share on other sites More sharing options...
SherlockWV Posted July 15, 2004 Share Posted July 15, 2004 Robert brings to light an interesting point. i.e. Wt. of bullet being used vs the primer/powder. My friend runs a 147 gr. bullet for his Major 9mm load with HS-6. I have no idea about other powders/burn rate/bullet weights. Perhaps I have been misinformed but my understanding is that a SRP & a Mag Primer burns hotter so that the powder is more uniformly ignited and this combination produces more consistent accuracy. But....I must admit, I have to reach into the cobwebs of my mind for this data. Although I have never heard of this, the idea of Federal SRP metal being stronger is new to me also but it does make sense in so far as primer shear. Quite a few of my friends shoot Glocks (including the guy who makes 9mm Major) and methinks thay all use Federal SP Primers. I think because of "trigger jobs". I will have to ask to make absolutly sure. TR, I have no idea where you are in your shooting but I do know that for me, a trusted person who moderates on this site gave me some basic shooting fundamentals to work on to improve same. I have to master these before I start playing with primer/powder/bullet/seating depth combinations. The primary gun that I use already shoots better that I am capable of shooting so I just stay with the SP primers. Although I have tried different ones. Thanks! Good & Safe Shooting - JC Link to comment Share on other sites More sharing options...
Kingman Posted July 15, 2004 Share Posted July 15, 2004 I shoot major 38 super with win 540 and 124gr bullets. I used both spm and srp at the old 180 pf. The rifle primers showed alot less signs of pressure stress etc. I had almost 0 flow with the srp's, while with the spm primers I did have alot of flow, and an occasional blocked firing pin. Now with lower powerfactor not so much of a problem with the 124gr bullets that I use. I guess I will know more at the end of september when I switch to 9 major and try 115's maybe. Link to comment Share on other sites More sharing options...
Jon Merricks Posted July 15, 2004 Share Posted July 15, 2004 Try here, here, here, and here. Link to comment Share on other sites More sharing options...
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