Alliant Steel in 10mm Glock 20

[my_old_glock]

Were you using the magnum small pistol primers with the Steel powder loadings?

NO. I was using standard CCI LP primers.


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[The_Shadow]

Well you wrote:

NO. I was using standard CCI LP primers.

LP meaning Large Pistol, but you also said:

I didn't have any 10mm brass, so I used 40S&W brass (nickle).

Don't take offense, not trying to,  just fact finding, but the 40S&W are small pistol primed!  LOL   

Did the Alliant Steel powder appear to burn cleanly with the standard primer?
Do you think there would be some benefits to using a magnum primer do to Steel being a slower burn rate powder?

[my_old_glock]

Well you wrote:

NO. I was using standard CCI LP primers.

LP meaning Large Pistol, but you also said:

I didn't have any 10mm brass, so I used 40S&W brass (nickle).

Don't take offense, not trying to,  just fact finding, but the 40S&W are small pistol primed!  LOL   

Did the Alliant Steel powder appear to burn cleanly with the standard primer?
Do you think there would be some benefits to using a magnum primer do to Steel being a slower burn rate powder?

OOPS. I was looking at my 10mm brass when I wrote that.

I don't know what primer I used in the 40S&W. I looked at the brass and the primers are nickel plated. I have CCI magnum and standard primers and Federal magnum and standard primers that I could have used in those cases. If I had to take a guess, I would say it was standard CCI primers. I usually save my Federal primers for "match" target loads.

I would thing that using magnum primers might ignite more of the powder and boost velocity a little. I did a test with 38 special 148 wadcutters using both magnum and standard primers with the same powder charge, and there was no difference in velocity between the two primer types. It might be different in a 40/10mm case.

All three tests with STEEL powder shows black carbon on the inside of the case. There is also carbon on the outside on one half of the case. I think this is do to not having enough pressure to seal the case against the chamber, and letting gasses blow past.

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[Pinsnscrews]

I wonder how much of that seal is being compromised due to the very shallow seating of bullet...

[sqlbullet]

I would guess at least some.

[Desolo]

This is very informative, thanks for sharing! This will help oit when I get around to trying my own steel loads....
Are you going to try any heavier slugs?

[my_old_glock]

Are you going to try any heavier slugs?

Yes. I will try some of my 210 grain 41 Magnum slugs in real 10mm cases.


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[Desolo]

Awesome! I look foreward to seeing your results  I like the idea of using resized .41 bullets, since they are made for high velocity, may have to invest in a bullet sizer one day.... and maybe a .41 magnum revolver too 

[Pinsnscrews]

if you size them down for me, I will be happy to test them out of my 1911/10mm