Given that the same amount of material is removed from the barrel from stem to stern, I fail to see how balance is grossly affected.
The barrels on your rifles run clear to the buttpad?
Don't yours?
If the rifle balances well to begin with a rebore is unlikely to affect it by much if any. If it didn't balance well, then I'd expect that to remain the same after a rebore. Unless it was butt heavy. Seriously, how much weight to you honestly think is removed in the process?
I've done more than a few and haven't found one yet where balance was affected detrimentally. If it were, it is easy enough to add back a bit of weight to compensate.
