I too have a Rem 700 Mtn rifle 1990 vintage 22” .280
It shoots pretty much any standard bullet very well, the 120 NBT included. Is was curious about their jackets being thicker so i cross sectioned one and compared to the 140 gr NBT. They are indeed much thicker jacketed, like twice as thick. They are accurate and fast. I hit 3200 easily with H-4831 early in testing and quit there due to the accuracy being so good.
Popped quite a few rockchucks with them but moved on to 150’s for my hunting loads.
The 160 NP at 2900 and IMR- 7828 was so good i gave up on the 120’s …..even though my confidence in them is high.
