shrade Posted October 26, 2020 Report Share Posted October 26, 2020 I don't have many small pistol primers left in the stash, Is it possible to work up a 9mm load substituting small magnum primers, or is this out of the question? Quote Link to comment Share on other sites More sharing options...
MikedaddyH Posted October 27, 2020 Report Share Posted October 27, 2020 Small magnum pistol primers can be used with BALL powder. Start on the low end of the book charges. Quote Link to comment Share on other sites More sharing options...
shrade Posted October 27, 2020 Author Report Share Posted October 27, 2020 Thanks I appreciate the info.. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted October 28, 2020 Report Share Posted October 28, 2020 IMAO small mag pistol primers can be used for small pistol data for any powder, and like @MikedaddyH says start a little towards the low end for safety, just like working up any new combination of components. I'm sure this oversimplifies the physics, but I believe that is because even though the powder is ignited a little faster, the bullet also picks up speed a little faster before it hits the lands so effectively balancing out the pressure curve/ spike. Anyway, never saw much of a velocity bump from the mag primers, or signs of over pressure. Crony Beta and LabRadar, semi's and revolvers Quote Link to comment Share on other sites More sharing options...
shrade Posted October 28, 2020 Author Report Share Posted October 28, 2020 Thanks tp MikedaddyH and Albroswift for the info, this is great news as I have quite a few small pistol mag primers. Maybe enough to get me thru the current BS. Quote Link to comment Share on other sites More sharing options...
MikedaddyH Posted October 28, 2020 Report Share Posted October 28, 2020 5 hours ago, shrade said: Thanks tp MikedaddyH and Albroswift for the info, this is great news as I have quite a few small pistol mag primers. Maybe enough to get me thru the current BS. Just use Ball powders (Spherical) that is a very important MUST item !!! Quote Link to comment Share on other sites More sharing options...
shrade Posted October 28, 2020 Author Report Share Posted October 28, 2020 3 hours ago, MikedaddyH said: Just use Ball powders (Spherical) that is a very important MUST item !!! Noted Mikedaddy, thanks again. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted October 29, 2020 Report Share Posted October 29, 2020 3 hours ago, MikedaddyH said: Just use Ball powders (Spherical Why is that? I've run AA5, 3N37, ball powders with mag primers, but also Tightgroup and HP38 which are flake with mag pistol primers, didn't seem to be an issue. Seems like 10 or 12 years ago or so there was a component shortage, caught me a little shortand and I used mag primers for everything. Lots of 9mm steel plate league and 40SW uspsa. Pretty well stocked up before this one hit... . Quote Link to comment Share on other sites More sharing options...
Albroswift Posted October 29, 2020 Report Share Posted October 29, 2020 Here is a reduced recoil 357 load with mag pistol primers and just a pinch of tightgroup, for example. Quote Link to comment Share on other sites More sharing options...
MikedaddyH Posted October 29, 2020 Report Share Posted October 29, 2020 Magnum primers were designed to be used with Spherical powders originally to completely burn the powder charge. In rifle cases. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted October 29, 2020 Report Share Posted October 29, 2020 Even if you are sure of that statement, ignoring extruded powders, doesn't really mean you can't use them in pistols and revolvers ( or long guns ) with flake powder. What would be your concern? A lot of good pistol powders are actually shotgun powders, and shoguns use shotgun primers. Doesn't mean I have to use shotgun primers with tightgroup in my 40SW or 44SP. All about development, not original intent. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted October 29, 2020 Report Share Posted October 29, 2020 4 hours ago, Albroswift said: Why is that? I've run AA5, 3N37, ball powders with mag primers, but also Tightgroup and HP38 which are flake with mag pistol primers, Specifically, TightGroup is such a small flake, it's even smaller than some very fine ball powders. Two that come to mind are Accurate 2520 and Accurate 2495. Very fine ball powders. TightGroup is smaller than those. Not that it means anything towards this conversation - just stating that TightGroup is not your common flake powder. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted October 29, 2020 Report Share Posted October 29, 2020 (edited) Most flake is just smashed ball anyway.. Some of those accurate powders are so fine I had to make a 1 piece powder bar for the Dillon for small charge weights, they gum up between the 2 sliding pieces in the 2 piece pistol bar. Edited October 29, 2020 by Albroswift Quote Link to comment Share on other sites More sharing options...
392heminut Posted November 21, 2020 Report Share Posted November 21, 2020 I've used small pistol primers and magnum small pistol primers interchangeably for years. Never had a problem and yes, I've done it with powders other than ball powders! On 10/28/2020 at 7:14 PM, MikedaddyH said: Magnum primers were designed to be used with Spherical powders originally to completely burn the powder charge. In rifle cases. As Tom would say, comparing apples to hammers there Mike! You're referring to rifle cases and an issue that cropped up with the original M-16s used in Vietnam and hasn't been a problem for decades now. Nothing to do with pistol reloads! Quote Link to comment Share on other sites More sharing options...
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