Re: 338 lapua reloading help
I have the same rifle. After load development I settled on Hornady 285's, 91.5 grains H1000 for 2800 FPS. You shooting off a bipod? Bench, prone, etc???? 83 grains of ADI 2217 (H1000 equivalent) seems pretty light. When I was shooting 300 Berger OTM's I went high as 91 grains with no pressure signs. That got me to 2700 FPS.
Never got any 300 pills to shoot well. Try some 285's.