Have an barrel ordered from OTT .We have been talking about twist rate and aol for a dummy cartridge. My handloading has been for the smaller cal . 6mm @ .224 cal., these bigger cal. are new to me , if you discount 50 cal muzzle loader. What kinds of aol's are you guys using and what twists.I am like Gregory in that I'm going to use this round for deer here in S. Il. Thanking you in advance.