So i am loading my first rounds for my Tikka tonight and have a question. My hornady manual lists max for this cartridge really low compared to what i have read everywhere. I believe it is because they don't publish modern pressure data because it wouldn't be safe in the old military guns. Question is. My data is. Grafs Brass Hornady 129 gr Interlock SP Powder is IMR 4350 stepped up at 43.5, 44, 44.5, and 45 grains. I have read several accounts of guys who claim that 44 and 45 grains IS about their sweet spot with a 129 SP. C.O.L., i have set at ~2.92. Does this sound about right? Also, something i haven't encountered before, (only other round i load is .223) is the bullet compressing or contacting the powder somewhat. On my lower charged loads here, there is space between bullet and powder, on the higher ones, it may start to make contact. Does this step pressure up more than what you would obviously expect due to the higher powder charge? Thanks for the help for a reloading newbie. Wanna kill these ads? We can help!