Tom gave you good advice, bed the forearm also slightly relieve and bed the radius/flat where the forearm goes against the action. Quickest way to tune a No.1 is add a Hicks Accurizer before bedding. As far as bullets 53 VMax is an iffy with your 14 twist. Found on mine it likes flat base more than boat tails. 53/55 Varmageddon shoot well, 50 blitz or 53 Sierra work also. Powders H380, 4895, Benchmark and Varget work good. Also get the trigger cleaned up by a smith who knows what he’s doing. Best prospect is 3/4” with occasional 1/2” or better but it will never be a consistent 1/2” gun. Good Luck.
https://eabco.com/Hickspkg.pdfMine,