I'm about to start load development with my 26" 8 twist 300 NM that I just put together.
I found 3 lbs of N565 and would like to give it a try with 225 ELDM's, anyone tried that combo yet?
I'm throated for 3.6 oal with those bullets.
I am having nice results with Bergers 200.20x and N570 in Peterson brass, Keystone acc custom built, Curtis Axiom and Krieger 5R 26" 1/10 Heavy varmint profile. With 84.5gr and 2.800 CBTO I got:
- 3010 fps single digit ES
- one ragged hole all day at 100m
- still a mild load very gentle with brass, same recoil as a 308w with a good brake ( a419 sidewinder, Heathen or a Muscle Brake)
I can shoot it all day long, and very clean. If you use more power VV gets really dirty.
- piece of cake on a 20"x20" plate at 1000m, with less than 8 mil on the elevation
N565 should be very similar only smaller kernel size (N570 is really a big seed, 0.1 grain per kernel on my FX120)
My buddies are shooting N570 88gr under 215 or 230 bergers with great success. Work up your load as YMMV.
With a 8 twist I would look at solids also you might become really hard on ELDM jacket. Maybe not for you if you are hunting