Better go buy a Rem 700 7mm mag
, My rem700 can take bullets longer than my lands anyway though. Mine shot rl22 best close to the land like you, but it shoots h1000 amazingly well and i'm about .1 or more off the lands...might be worth trying a couple different powders...i've had success with h4831sc farther from the lands as well. These are all with the 168 berger as well...i love that bullet.
One to try might be the 162 Amax, i'm not sure how much shorter it is, but it is a little shorter and has an amazing BC as well. I really like the 150 sierra hpbt match, but i haven't hunted with it, I know it's not intended for hunting but i haven't researched how they perform on deer or elk, you know guys have tried it haha.