1st off. Kick yourself for doing some many mods on an accurate rifle.

Now back to business. Look at runout of loaded rounds for accuracy issues. Velocity I'm not sure but can say you should have a 22LR or something to test the chrony each day.

"IF" all the work done is done properly it shouldn't be the rifle.

But as for me and my house we will serve the Lord. Joshua 24:15
I can do all things through Christ who strengthens me. Phil. 4:13

I DON'T NEED A WSM AS I HAVE A WEATHERBY!