Ok, I shoot the 338 RUM and have some of those SMK's coming. What powder are you using? I don't think I'll be that far off of what you guy's are getting as all I have shot in mine have been 250 grn. Swifts and Core Lokts. ! I have a switch barrell that has the 7,300 & 375 Ultra mag. and was thinking of adding the Edge just as simple as making a new barrell and threading it right, maybe with this one I'll go the 28" or 30" barrell though and not the 26" like I have now any thoughts on this?