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They will work if that is all you can get. Start low and stop short of max data. If you use a chrono you can just stop when you reach the velocity you normally get with that load using regular primers. Some guns may have trouble setting the primer off. Light springed revolvers specifically.
I have used them in the past and have had no issues(I did lower my powder charge some). Looks like I'm gonna have to use them for a batch of .38spl loads. Can't find standard small pistol primers anywhere in my area either..
It looks like you already got the correct answer to your question. Don't worry, I'm sure the panic buying will let up fairly soon now and you will be able to get standard SPP.
I sent my father-in-law to Gander mt to buy me small pistol primers and he came home with 1000 small pistol MAGNUM primers.
I also reload 9mm with 115 gr bullets with Unique.
SAME POWDER THAT I ALWAYS USED. I tried 3 different 9mm guns.
Glock, SIG, and Another Sig.
same results. Off a sandbag at 10 yds. yes TEN YARDS.
Groups were 4 inches HIGH at ten yards.
Groups were 6 inches high at 25 yds.
Normally, with small pistol primers my groups were so small you couldnt count the rounds at 10 yds and on target at 25 yds. So i still have lots of trial and error coming to work up an accurate load with the MAG Primers.
My normal load was 5.7 gr of unique.
I made some of them, and I made some at 5.2 gr unique. NO DIFFERENCE.
Next will be 4.7 and 4.2 of unique. Hope I can find a load that works accurately.
No exessive signs of pressure noted on the cases.
All primers fired without problems from all 3 guns.
If the bullet is centered and it's only high just adjust the sights. If the sights are fixed make the necessary adjustment to your POA to achieve the desired POI like we all do with fixes sights.
Well, I don't use Unique for 9mm rounds so I can't tell you first hand how it reacts with a Magnum primer but I find it very hard to believe the use of a Magnum primer alone is the reason for such large groups. I do know 2400 will work better with a standard primer over a Magnum primer when loading for the .357 Magnum but the results are only slightly off, not 4" and 6" groups. Are you totally sure the primers are the only changes made to your ammo? OAL, brass and bullets are all the same as used in ammo that grouped well in the past?
*EDIT*
I'm only mentioning 2400 because it's similar to Unique in that both are flake powders and 2400, unlike other Magnum powders usually achieves better results with a standard primer. I'm not recommending 2400 for loading 9mm ammo.
I would NOT use 2400 in a 9mm case and I wasn't saying that. I mentioned 2400 because it's a similar powder to Unique in some ways like being a flake powder (but not burn rate) and unlike other Magnum powders it doesn't require a Magnum primer. It seems to give better results with a standard primer.
IMO w231 is a good powder for loading the 9mm and for something hotter when using a jacketed bullet Longshot gives me great results.
I have used magnum pistol primers since 1995 in 38 special and 9mm and as mentioned start low and work up the load and be careful. I boosts pressure up .I notice it in primer inspection.
Magnum primers have more priming compound, and give more fire. Powder ignites and burns faster. The result should be like replacing powder to a slightly faster one.
For light loads it is perfectly fine. It may be even better than regular primer - higher pressure seals the chamber faster, gives less smoke and cleaner brass. For maximum loads the extra pressure is a problem - so go 10% down and work up as usual.
Steve, I have used small rifle primers in 9mm-124gr. Plated Bullets, and in .357 target loads-148 HBWC. I lowered my charge on both loads .5-1.0gr. and loaded as normal. No difference noted to me. The only problem that I could foresee, could be from a light hammer strike, due to the thicker cup on a rifle primer. The rifle primer has no problem also to fire large volume .357 loads, in place of a Small Pistol Magnum Primer. I'm going to use what I got, until the supply comes back, at a "Livable" price!!
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