There is nothing wrong with it. For you to think you will have 1 hole groups with ANY rifle is a bit unrealistic. You said in the first post that you had A COUPLE groups under 1”. That is testimony to it being capable of shooting sub MOA. You need to find what your rifle shoots well and stick with it. Preferably by way of reloading. I have always found that my reloads, even with simple case prep, are more accurate than the BEST factory ammo.

Lastly, a heavy barrel is no more capable of accuracy than a Varmint or even Sporter barrel! Simply that the heavier barrel is less prone to warpage & harmonics.