Can I Mix primers
- Thread starter Moike
- Start date
- Location
- Hillbilly shack in the boonies
primers are just that, use 'em where there need as for size, the problem is mixing makers, and std , with magnum, or match, keep it simple, batch, and work up loads always...
- Location
- Hillbilly shack in the boonies
I don't have any guns that take small pistol primers, but do know that they are also used in the 454 puma rifle ,223(small rifle) and others,?don't quote em here, but the soft/hard issue might be a problem, good question!
I use the manual's , and the only answered question I had , was ball versus stick powder, where a hotter primer was req'd...
I use the manual's , and the only answered question I had , was ball versus stick powder, where a hotter primer was req'd...
Pistol primers are definitely thiner cased. I used them in the 22 Hornet, certainly not loaded too hot, but the primers looked like they were in a badly overloaded cartridge. I can't really understand it, because I use the same primers in the 357 mag, which runs about 35,000 cpu.
However, the 45-70 Marlin is loaded to such light pressures, 30,000 cpu would be heavier than I load, that I often use large pistol primers in it.
Pistol primers are used in the 44 magnum, which has pressures as high as 40,000,cpu. It may be just chance, but my most accurate in the Marlin have been with pistol primers!
However, the 45-70 Marlin is loaded to such light pressures, 30,000 cpu would be heavier than I load, that I often use large pistol primers in it.
Pistol primers are used in the 44 magnum, which has pressures as high as 40,000,cpu. It may be just chance, but my most accurate in the Marlin have been with pistol primers!
blacksmithden
CGN Ultra frequent flyer
I've used large pistol primers for full pop loads in my 300 win mag. I've also used magnum rifle primers in my 44 mag revolver. Nothing wierd has ever hapened. I don't have any small pistol/rifle anything, so I can't comment on them. I should also note. My favourite full pop 300 win mag load is 68.5gr of 7828SSC under a 180 grain Speer spitzer. I did a test to see if the accuracy or impact point changed when I went between magnum rifle and large pistol primers. Absolutely no change at all.
"I did a test to see if the accuracy or impact point changed when I went between magnum rifle and large pistol primers. Absolutely no change at all."
Thanks for that Denny. I always get taken to task on these threads when I suggest with your rifle, you can interchange any large rifle primer, without retesting and working up the load. Bruce
Thanks for that Denny. I always get taken to task on these threads when I suggest with your rifle, you can interchange any large rifle primer, without retesting and working up the load. Bruce
rnbra-shooter
CGN Ultra frequent flyer
- Location
- New Brunswick
FYI, small rifle primers and small pistol primers are dimensionally interchangeable. (For very high rifle-level pressures, the softer/thinner small pistol primers might not be strong enough).
Large rifle primers and large pistol primers are NOT dimensionally interchangeable. They are both the same diameter, but the rifle primers are slightly taller. (and like the small primers, there are the same rifle vs. pistol pressure and cup strength issues).
Seating a large pistol primer into a rifle case will result in the primer being seated unusually deeply.
Seating a large rifle primer into a pistol case will result in the primer not being seated deeply enough, and in many cases it might actually protrude above the level of the case head. This is not desirable, and can be unsafe.
Large rifle primers and large pistol primers are NOT dimensionally interchangeable. They are both the same diameter, but the rifle primers are slightly taller. (and like the small primers, there are the same rifle vs. pistol pressure and cup strength issues).
Seating a large pistol primer into a rifle case will result in the primer being seated unusually deeply.
Seating a large rifle primer into a pistol case will result in the primer not being seated deeply enough, and in many cases it might actually protrude above the level of the case head. This is not desirable, and can be unsafe.
- Location
- The Conservative part of Ontario
The last pierced primer I had was on a pistol primer I'd mistakenly placed in a 308 case.
Most of the cases primed with the pistol primers were just flattened out more than the rifle ones. They squared right out at the edges, like you were running a max load, and I wasn't.
Most of the cases primed with the pistol primers were just flattened out more than the rifle ones. They squared right out at the edges, like you were running a max load, and I wasn't.
blacksmithden
CGN Ultra frequent flyer
Bruce. Would it maybe make a difference in a smaller (by case volume) rifle if you swapped primers......or a greatly reduced charge ??? What I mean is, 68.5 grains of 7828 is a pretty big charge. It doesn't jam the case completely full, but it's a lot closer to full than empty. In my cast stuff, I'm using 16 grains of Unique. That takes up...what....15% of the case volume??? It's pretty small. Do you think switching out primers would make a difference with a smaller charge like that ??? I think I smell another experiment coming.....
Absolutely correct.
If I may add:
The rifle primers should burn hotter and more aggressively than pistol primers. This is to ignite the greater volume of powder inherently found in rifle cartridges. I have found some benefits by putting rifle primers in some pistol loads depending on the powder used. You can even gain some FPS with some powders, but it is minimal.
I'm not sure which forum I was roaming but I remember an employee of CCI (i think CCI?) was a member and stated that the SPP and SRP where taken out of the same lot. Exact same primer.......whether he was telling the truth, I couldn't say.
