Could be a Remington ammo quality issue. I was zeroing my kimber last week, and shooting Remington premier scirocco. Had 3 ftf in about 12 rounds attempted. I need to measure, but it looks like the primers were seated too deep. I also had one that hit about six inches high of the group and caused hard bolt lift. Not impressed. After zero, I switched to my nosler trophy grade 180 accubomds. Re zeroed and cut my groups in half or better.
Could be the Kimber. mtmuley