That sounds like a lot of fun. However, there a few caveats with this cartridge. Originally and officially, it is NOT a "10mm" bullet diameter. You need to either have the machine report or measure. The 10mm AMT Mag is originally .397" bullet dia. This means, if the bore is original design, .400" and .401" bullets may not be friendly. If you load original 10mm Mag bullets (at .397/8"), and the bore is current 10mm Auto, performance will suffer, and lead bullets will be abysmal and messy. Just suggesting you verify what you have is what you think you have. If there's any doubt, measure. This round was originally developed for the Automag pistol, and not much original data is available for it. 1992 was a long time ago, and not much has been done with it since. It is recommend to use small RIFLE primers, for all but the lightest of loads with small bullets. Larger bullets (180+) should see much slower/magnum powders and full C.O.L. (1.550", +-.003"). That's a lot of case volume for fast powders. Also verify the headspace is very tight, with moon clips or rimmed cases being the preferred method, with open case head (closed would be better). The original design spec (NON SAAMI) was a 220 gr. heavy jacketed bullet at near 1400 FPS through a 6" barrel. Have fun with it. I know I would!