small pistol vs small rifle primers.

[jimlj]

I have read small pistol and small rifle primers are the same/interchangeable. I have also read your gonads would fall off and beagle puppies everywhere will die if you use the wrong primer.

I have used small rifle primers in all of my pistols, and a AR 9mm "pistol" with no problems. (Standard AR15 lower and parts) I have not tried small pistol primers in small rifle cases (yet). What do you think?

[DeadWoodDan]

All depends on application. If your at max pressures you better have the right components or danger to yourself andv those around you

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[JimB..]

Folks use SRP, SRMP, and SPMP in place of SPP all the time, just work up to the load as you would when changing any component.

Fewer folks seem to use SPP in place of SRP and I’m not heard of anyone using them in place of a magnum primer. The basic guideline seems to be that if you’re load is at pistol pressures then a pistol primer will probably be fine. Watch for pierced primers.

[centershot]

A while back, on Leverguns.com, IIRC, someone posted that he had called and talked to someone at CCI. They told him that their SPM were the same as their SR primers, different label but the same mix and amount of compound. AFAIK, that's where it begins and ends. LR and LP use different size cups (STUPID idea!) so no compatibility there. Not that anyone hasn't used LP primers in their 30-30 or whatever caliber rifle from time to time, it works, usually. AND, the SPM-SR thing is only true of CCI, AFAIK! It may apply to other brands, maybe not.

[flyer1]

I made the mistake of using spp in place of srp. Ended up having the spp pierced from in the inside out where the firing pin struck the primer. This was with the .223 in an ar15. I was told by cci that the pistol primers are softer than rifle primers.

[farmbif]

there are differences in primers, Remington 1 1/2' are good only for 38 spl and other low pressure loads same with Remington 6 1/2's good for 25-20, 22 hornet-- low pressure loads. regular federal primers in general seem softer than other brands I guess that's why they offer ar sr primers and all the benchers primers they offer. the only ones I would think of interchanging only if I absolutely had to would be small pistol magnum primers in place of sr primers and would be very careful in watching as I worked up loads. there is a reason why there are sp, spm, sr, srm and so on. save up money now so when stores are stocked and prices normalized you can get what you will need for future use.

[dtknowles]

I sometimes use small pistol primers in my 22 hornet rifle loads. I sometimes use small rifle primers in my .357 Max pistol loads. Depends on the choice of powder and pressure. Low pressure, easy to ignite powder usually small pistol primers offer better accuracy. High Pressures and slower powders small rifle or magnum small rifle primers are needed. Any doubts, use a load from the manual and use the components in the manual.

Tim

[dangitgriff]

R/Griff

[dragon813gt]

R/Griff

This is great for dimensions but it doesn’t account for cup hardness or brisance. Dimensions are only part of the story.

If you want to know the difference call the manufacturer. There’s no reason to believe the internet when you can get the answer straight from the source. And regardless of the answer if you have a load worked up w/ one primer type you need to rework up the load if you switch types.

[M-Tecs]

Very correct. One of the better examples are the Remington 6 1/2 verse the Remington 7 1/2. Both are small rifle primers of physically the same size yet the 6 1/2 will only handle low to medium pressures while th3e 7 1/2 reportedly will handle the highest pressures of all brands of primers.

This is great for dimensions but it doesn’t account for cup hardness or brisance. Dimensions are only part of the story.

http://www.jamescalhoon.com/primers_...more%20rows%20

[redneck1]

I've used plenty of small rifle primers in place of small pistol .
Never gave it much thought , but 99% of what I load is low pressure and not a concern if they happen to be a bit hotter .
I've never gone the other way though . not knowing for sure never deemed it worth a chance with higher pressure rifle loads .

[dangitgriff]

I agree with your point, but manufacturers have to fabricate their products to a standardized specification.
My point being, according to SAAMI specs, SPP & SRP are dimensionally interchangeable whereas LPP and LRP are not.
R/Griff

[Stephen Cohen]

I sometimes use small pistol primers in my 22 hornet rifle loads. I sometimes use small rifle primers in my .357 Max pistol loads. Depends on the choice of powder and pressure. Low pressure, easy to ignite powder usually small pistol primers offer better accuracy. High Pressures and slower powders small rifle or magnum small rifle primers are needed. Any doubts, use a load from the manual and use the components in the manual.

Tim

It has been a well held belief that pistol primers in the Hornet gives better accuracy.Regards Stephen

[Battis]

Last week, I loaded some mild .32 acp loads, some with SPP, some with SRP. At the range, my 1914 Mauser handled both with no problems, but my 1907 Savage had a few problems with the SRP (weak spring maybe). Accuracy and velocity were the same. I only used the SRPs because I had them and I'm running out of SPP.

[Jkrem]

I’m late to this thread, but I loaded some light 38sp castboolit target loads with federal small pistol primers last week, and am happy to report my gonads did not fall off and our neighbor’s beagle pup did not keel over. As I was shooting my 2” model 36, accuracy is a relative thing but I was putting them all in minute of paper plate.

[jimlj]

I'm going to reinforce a jock strap with gorilla tape and load a few .223 with some Winchester sp magnum primers. Watch your pups.

If I live through it I'll report back.

[Martin Luber]

I'm going to reinforce a jock strap with gorilla tape and load a few .223 with some Winchester sp magnum primers. Watch your pups.

If I live through it I'll report back.

Ready to buy new firing pins?

I wouldn't risk gas in the face

[M-Tecs]

SP in place of SR in AR's carries another concern of increased risk of slam fires.

[JimB..]

I'm going to reinforce a jock strap with gorilla tape and load a few .223 with some Winchester sp magnum primers. Watch your pups.

If I live through it I'll report back.

Several potential issues with this as already pointed out. If you’re cautious enough to stick to pistol pressures you probably aren’t going to cycle an AR.

When you say “hold my beer” I say “roll video!” Good luck

[jimlj]

Thanks for helping me put the brakes on my stupidity. I'll refrain from the sp primer in my 223. Your pups (and my gonads) are safe.