I must be mistaken. Am sure it was 300 prc brass being improved and thought it was a Sherman design. Well good luck with it.The Max is an improved SAUM. Case capacity is ~77 grains if I remember correctly. Should push the 213 Hammer just over 3000 and the 235 hammer close to 2900. I haven't seen any loads with the TTSX but the 185 should be getting up there.