[Benchrst]

The 10mm is an awesome (vs odd) duck, almost any pistol powder will work.

That said, fast for plinkin', slow for devastating-earth-destroying destruction

 

[Benchrst]

My experience with 800-x was like yours except that I had some spooky pressure symptoms on top of it.

While I don't dislike 800X, I was never able to get anywhere near what some are loading without brass shear.

Maybe it's the tight chamber, but I found my stopping point well south of other's max loads.

 

[Benchrst]

Agree. I Think most that have worked high pressure 800x loads are just getting lucky. I have gotten the vel but not the accuracy I want. Since no one has put out pressure data I am aware of, I'll not buy more, just wasting my $$$.

After almost a year off I'll be testing with my Pressure Trace this spring / summer, should be interesting where 800X loads end up.

 

[Benchrst]

Cool. Been wAnting to get one but imo, Need a tc to do the testing. What are you testing with?

I built a platform that uses interchangeable barrels. The first two, a G20 LW with the chamber turned down & and an AR, provided low, but consistent, readings.

I purchased a 4140 Green Mountain .40 blank a while back, just need to have it chambered.

The 4140 barrel should provide more realistic numbers vs. the SS LW & Kaw 4150 barrels.