Often, stocks and bedding blocks are not milled correctly, I can not stress this enough. I would bed the recoil lug for a start at a minimum if you have not already, and a free floating barrel would be a must...you can always add shims later on for a Hail Mary try to fix. While at the range, you can cut up an old credit card for a pressure point, one or two thicknesses...trial and error. When freefloating, I do not like a dollar bill thickness, a business card thickness clearance helps reduce "Barrel Slap" on the stock.
Hot load of IMR 4064/Varget, Rem brass, Fed 210, 80g Sierra is MAGIC as long as the bullet is kissing the lands....jumping....not so much.
Bench technique of holding down the forearm on the front rest is VERY important, shooting off of a bipod leads to Larger groups...You need to hold that forearm down. Rear Bag squeezers have trouble with the technique of holding the forearm down.
Good luck!