I'm trying to develop a load for my Remington 721 30-06. I rebuilt this rifle over the winter with a BDL stock new bluing etc. Took it to the range and got three rounds all touching one another at 25yds using 180 grain Remington factory ammo. Wow, I'm thinking this is going to be easy. At 100 yards using 165gr hand loads the story changes. I consistantly shot a verticle line dead center and high from 3 to about 6 inches from center. I was out of factory loads so I don't know where they would have hit at 100yds. I had three loads Nosler Partition 165gr using RL-4350 at 53,55 and 57 grains. They all shot about the same. I'm inclined to think maybe the rifle likes the 180 grain bullet. Any suggestions on where to go next with this. Thanks, Ken in Corvallis ( I was cranking the scope down)