I'm attempting to put standard leupold mounts/rings/scope on a winchester M94 AE trapper .44mag. The existing 6-48" screws holes had to be opened up to 8-40". The front mount is no problem opening up the holes for the 8-40 screws. The problem is the rear mount. The 8-40: screws measure .162" dia. The holes in the mount measure .146" dia. That means there has to be .016" removed or .008" per side. Theres only .025" of material on outside edges of the holes now. If I take another .008"per side from the I.D. that leaves only .016/.017" material left on the outside egdes. Also the counter-bore would have to be opened up to at least .235" which would in turn screw down on the very outside edges of 8-40" holes. The mount also has .146" material thickness between screw head and rifle. Also the 8-40 screw holes only have app 1.5/1.75 turns before they get tight. Does anyone thinks this would work out ok or theres not enough metal left to stay rock solid. The mounts are leupold steel. All comments or advice will be appreciated. Thanks