Are Small Pistol Magnum & Small Rifle Primers Safe in 9mm?

**ArmyVet** · January 16th, 2021, 05:34 PM

**ROCK-IT3** · January 16th, 2021, 08:44 PM

Good video. This information could open up some options for people running low or out of SPP's.

**57springer** · January 16th, 2021, 11:26 PM

Originally Posted by ROCK-IT3

Good video. This information could open up some options for people running low or out of SPP's.

For sure!

**scruff** · January 16th, 2021, 11:51 PM

Originally Posted by ArmyVet

I just tested CCI small pistol magnum primers vs. Winchester small pistol, using Bullseye in 9mm 125 gr. loads. There was no difference in velocity. I'm comfortable using them interchangeably, although I'd repeat the same test before using a different powder.

**ArmyVet** · January 17th, 2021, 09:34 AM

Just to point out the obvious, you'll have to work up loads for other calibers...especially magnums.

Alliant 2400 can be reliably ignited with standard primers...other slow burning powders such as H110 should probably use magnum primers. Consult the manufacturer's load data.

Perhaps others can share their experiences...