I'm looking at developing a bench rest rifle for 600 and 1000yds in 28 caliber and using 180gr Bergers. I'm open to any suggestions. I know some are using the straight 284 win and necking up 6.5-284 brass and some are using the 7mm win short mags. Have not heard a whole lot about the 280. I own one powder burner trying to stay away from the mags , and I was wondering if anybody was using the RE-17 and the 180 Berger in the 284 or 280 and getting between 2900 and 2980 fps velocity without popping primers sticking bolts and with a barrel 30" or Less. Looks like most of the 7 mags will make it , however I'm trying to stay away from the recoil, and barrel and powder burners if at all possible. I think I already know the answer to my question but I thought I'd throw this out there.