Here is what I do when I accurize a #1. I bed the forearm to the hanger, float the barrel, re-crown the muzzle, adjust the trigger, re-place the mainspring, smoothe the safety, lap the scope rings, and adjust the quarter-rib. Generally, these rifles will shoot around 3/4" at 100yds after they've been accurized if they have a half decent barrel from the factory. This is with good handloads.
Have you done any work on the Browning Low Walls? I have one in .260 that is not shooting well, but is much too beautiful a rifle to part with. Think you could help me with this?
Savage99 - I routinely swiss-cheese the hammer, but I really haven't seen it make too much difference if you've replaced the mainspring with a heavier one.
Good luck, i had a 1A light sporter in .243, and that gun would shoot patterns, not groups. It was absolutely the biggest piece of junk i have ever owned. I hope you have better luck than i did!
cowboy - the most important thing about the quarter rib is that the back edge of it absolutely must not touch the action. You can accomplish this by grinding, but we ues the mill. Also, some of them are warped quite badly and need to be fine-tuned so they aren't binding as much when you re-install them.