RE: Best load for Rem 280?
I have had my best accuracy and velocity with RL19 & IMR4831. I use the 140 gr. NBT for my deer load. In the Nosler reloader guide number four I use the max load of RL19 and get 3/8" 3 shot groups out of my rifle. With a max load of IMR4831 my rifle prints 3/4". I use Federal 210M primers in all of my loads and winchester nickel cases. I seat the bullets .015 off of the lands.
My rifle is a Rem. 700 action w/Douglas heavy sporter weight barrel finished at 25.5". I actually exceed the velocity in the Nosler guide by 60 fps with RL19 giving me an average velocity of 3212 fps. Of course, all rifles are different.
If this is your first 280 I believe you will love it.
I'm currently working up a Load with the 175 gr. Nosler Partition to take on an elk hunt in the fall. I'll post the results when I'm finished.