Will it work?

Amps 13

Amps 13

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So in part of a trade I ended up with some primers that I do not reload with. I tried to trade them as a whole for SPP but no takers.
My 1st question is can I load 38 special with SPP magnums (have CCI & Winchester). If so do you have a recipe? I would be using HP-38 or Unique powder with 158 RNFP .358 bullet.
My 2nd question is I read somewhere that you can use SRP in pistol cases. Is this true and if so do you have a recipe for 9mm or 38? Same powder and 115 bullet for 9.

if it’s a bad idea please tell me that also.
thanks
 
You won't likely find published data for this but it's not a terrible idea.
SPM and SRP can cause pressure spikes if dropped into a known good SPP recipe without going through the process.
Treat it as a new load. Start slow and work up.

That said... I have accidentally used SRP in 9mm with Unique. I didn't notice until I saw the wrong box in the trash can. The ammo shot normally and nothing blowed up. YMMV, so see above.
 
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Catfish said:
You won't likely find published data for this but it's not a terrible idea.
SPM and SRP can cause pressure spikes if dropped into a known good SPP recipe without going through the process.
Treat it as a new load. Start slow and work up.

That said... I have accidentally used SRP in 9mm with Unique. I didn't notice until I saw the wrong box in the trash can. The ammo shot normally and nothing blowed up. YMMV, so see above.
Click to expand...
Maybe plausible then.
 
It seems that many people use both SPP Magnum and SRP in 9mm and 38 Special, so yes, it can be done. The only problem I have ever had was getting some SRP to fire in several striker-fired 9mm pistols. I accidently loaded some 9mm rounds with SRP instead of SPP.
 
Catfish said:
You won't likely find published data for this but it's not a terrible idea.
SPM and SRP can cause pressure spikes if dropped into a known good SPP recipe without going through the process.
Treat it as a new load. Start slow and work up.

That said... I have accidentally used SRP in 9mm with Unique. I didn't notice until I saw the wrong box in the trash can. The ammo shot normally and nothing blowed up. YMMV, so see above.
Click to expand...

Not as much as you think:

 
Not so...
He proved that his recipe is unaffected. thats all. you can't safely assume yours will behave the same without testing it.
 
The magnum SPP will work fine for light to medium loads in .38 Special. No need to worry, just start modestly and work your way up to wherever you want to go. You can use SRP in .38 Special also, same caveat. Most revolvers will light them off with no problems unless you've reduce the hammer spring. I have done both, but not in .38 Special. I've used Magnum primers in my light 9mm loads for USPSA and actually prefer them. I've accidently used SRP's and not had any problems with them in my SA and DA revolvers.
 
Catfish said:
Not so...
He proved that his recipe is unaffected. thats all. you can't safely assume yours will behave the same without testing it.
Click to expand...
Exactly. You can’t draw a general conclusion from testing only one powder and charge, and even then on such a small sample size.

I have seen a few powders that are very sensitive to primer type. Start low and work up.
 
I did a sample of 15 each with both kinds of primers using 4.9 gr of HP-38. Both in 9mm using 115 gr bullets.
we will see how they shoot. I don’t have a chronograph but will be shooting with a friend in a few weeks and he has one if I can get him to bring it with him.
 
My experience with SPMs over the Chrono has been that they have the same affect as + .1-.2 of powder with a non-magnum. If they knock you into danger territory you were flirting hard with disaster anyway.

Never tried SRPs in a handgun, have heard doable with load development but potential for light strikes may increase.
 
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