can I use magnum primers in 10 auto?

[CraigC]

"Working back up" serves little purpose. Pressure signs are meaningless in straight walled pistol cartridges. The only way to know what pressures you're running is to abide published loading data. Which includes primer selection.

I stand behind this. If he works back up to 5.4gr with the magnum primer he has no idea how much pressure his load generates. Why? Because he deviated from the published data. He could see zero pressure signs and still be several thousand PSI over his previous load. Now that may or may not be the case but the fact remains that when you deviate from published data you do NOT know what pressures you're operating at and only assume it's safe because there are no signs. THAT is my point and now we're back to my first post.

Maybe next time you'll ask an honest question instead of playing games.

 

[steve4102]

If he works back up to 5.4gr with the magnum primer he has no idea how much pressure his load generates. Why? Because he deviated from the published data.

True, but following load data to the letter will net the same results. No idea how much pressure his load generates, why because he is using a different firearm/test barrel, different lots of powders and primers, different temps and altitude, everything is a "deviation from published data", especially the number one component the Firearm.

 

[billybob44]

Thanks for the information.
I have to admit, I'm sketched out on using TG now Should I disassemble my other rounds with regular primers? Ive shot about 55 rounds with this recipe, but id rather not have a kaboom and not be covered with the warranty with my pre ban glock?

NO Reloaded Ammo is to be fired in your Glock--If so the Glock warranty is VOID.

You ARE on your own as far as Glock is concerned on reloaded ammo..Bill.

 

[CraigC]

NO Reloaded Ammo is to be fired in your Glock--If so the Glock warranty is VOID.

Virtually all manufacturers say that.

 

[GLOOB]

I'm telling you that pressure signs in straight walled pistol cartridges is an indication of nothing. I'm saying that you can be well below industry maximums and see so-called pressure signs. I'm saying that you can be well over industry maximums and see no pressure signs right up until the gun blows up. I'm saying trust your data and check it with a chronograph.

"So-called pressure signs" might not show up. But there are other indicators of too high a charge.

My G27 started to double-feed with empty cases stuck in the chamber when I tried to reach max jacketed data using a certain brand of plated bullets. The recoil was horrendous and groups were not even measurable. Yeah, the cases and primers looked fine, so there weren't any classical pressure signs. But there was an obvious problem!

If I was using a faster powder, it's possible I could have kb'd a round before getting failures to extract, I suppose. Even then, I'd think you would start seeing "guppy bellies" or "smilies" in your brass, having measurable expansion in the case heads, and/or getting loose primer pockets, first.

Sure, making substitutions might leave you slightly above SAAMI. But if you are not seeing any pressure signs and not having any other issues, then I don't see what the problem is. Your gun was pressure tested for 50% overpressure. It's not going to blow up. The brass will fail, first, and you will see signs in the brass.

Generally, when someone kb's a gun, it's either a doublecharge or an obstruction. If it's due to their regular load being overcharge, it's usually cuz it's WAY overcharged, AND they know it!

 

[MachIVshooter]

I use CCI magnum primers exclusively in 10mm, along with very healthy charges of IMR800x. The 10mm works well with medium-slow powders, and medium-slow powders play nice with magnum primers. As I see it, the 10mm really is a magnum cartridge anyway. It uses the same powders and virtually the same charge weights as .357 magnum in a case with similar capacity for very similar performance. 10mm has a slightly fatter a shorter powder column, but that's about it.

If you're using a fast powder in smaller quantities, use standard primers.

As CraigC said, there are no reliable pressure signs with stright handgun cartridges, but I will say that I've been doing this for many years using several different guns with nary a problem, not even in the thin chamber walled Witnesses. I only recall a single case head separation, and that was with nickel RP brass that had been loaded 6 or 7 times prior.

I actually adopted this doctrine because I started out using Winchester LPP, which are billed as standard and magnum.