A couple of months ago, I bought a NIB SS Weatherby Vanguard II in 243 Win, 10 twist. I put a Leupold VX III 4.5-14 in Leupold rings and bases and replaced the plastic stock with a B&C with aluminum bedding block. Then did a trigger job. The only thing I did that I am wondering if maybe I shouldn't have is ground out the speed bump in the barrel channel. So far, 120ish rounds later, and a ton of different bullet weights and powders charges, I can't get what I call decent groups. It is a sporter barrel and heats up super quick in todays heat, but it is struggling to get one inch groups at 100 yards. And these are three shot groups. Today useing IMR 4320 and an 80 Blitz, I got one group that might be 7/8. Just feel like this rifle should shoot a little better. Maybe I'm expecting to much. What do you folks think?