Thanks Maxx. Is that 10mm brass from a cut-down 10mm Magnum revolver case (as some internet photos have shown early 7.5 FK loads in), or just a 10mm auto?
You are welcome.
The 10mm case is just a standard piece of Starline 10mm Auto brass. This 7.5 FK case is quite a bit thicker ,and has a small rifle primer pocket. This case measured 1.055in in length. I will section some 357 Sig and 6.8 SPC srp brass when time allows to try and compare them all.