40mm ain't bad at that range. A lot of variables too that have caused me issues in the past trying to find the "perfect" load. Sorry if this sounds patronizing but are you letting the barrel cool properly between groups? I know with my tikka that will play havoc with accuracy after a few strings, especially with a suppressor on. Also if your scope isn't providing a solid point of aim at that range it may be better to bring it back to 100m for accuracy testing. This will also minimize any variations due to wind
Bookmarks