I took a $79.00 91/30 a few years ago, glass bed the action, free floated the barrel channel, and dremeled a little material off the trigger to make it a little lighter. From the outside, you CAN NOT tell I did ANYTHING to the rifle.
I then slugged the bore and decided to try the Hornady .312 bullets.
My average group at 100 yards was 1.05"
My best group at 100 yards was 0.85"
not bad for iron sights and one bum eye