280 Rem loads

[dogz]

I'm using RL23 under 150 NBT in Rem 700 MR it has put down two cow elk size animals and a Scimitar Oryx.

That would be a great load (as you well know). I use the 150 NBT in my 7 Mashburn Super and it is one killing sob

 

[manitou]

I am not sure if I asked this before but I need to get some 139 loaded up and I'd like to use the N560 that I have or I can go reloader 23 as well if anybody could help with that.

Barrell length?

 

[meatyrem]

24"

 

[meatyrem]

I have a couple references from quick load I could go off that as a reference.

 

[std7mag]

I am not sure if I asked this before but I need to get some 139 loaded up and I'd like to use the N560 that I have or I can go reloader 23 as well if anybody could help with that.

You might be a little slow on the burn rate given case capacity and bullet weight.
I'd probably try something in the RL19 range.
H4831, IMR4831, N550, or Ramshot Hunter.

 

[twooly]

My 280 has a slow twist, 10.5:1 and 22" barrel. With the 139 interlock I ended up using 52.5 of H4350. It's 1.5 MOA over 30 shots. My rifle did not perform particularly well with stuff in 4831 range.