I've used both on and both work.I've heard these theories that there is no sense using 140 in the 7RM,but don't really agree.140's at 3200+ are very flat shooting and accurate to long range,and at least in the Nosler Partitions and BBC's I've used,very deadly as well.The 140 AB,too, is an accurate flat shooting load that seems to do well on deer sized stuff,and if I ever find 140 Partitions inadequate for the task, I would reach for those again.
A friend who posts here just came back from a month in Africa;shot a pile of game up to zebra and gemsbuk in size with 160 Swift Aframes and 140 BBC's;said he could see little difference between the two bullets; both did a great job.
The 160's are great,too.Nice thing about a 7 RM is that you get very good velocities with everything from 120's to 175's,and leave nothing on the table as you move up in bullet weight;they all go pretty fast,something the smaller jugged 7mm's can't quite do.
