Load for .338 LM, Berger 300 Hybrids and N570?

[Wannashootit]

Just spun up a new Bartlein (30 in) .338 LM with my son while he's home for the holiday and gonna do some load workup.
We'd been using N565 with 300's to date (300 A-Tips) in the old barrel, he has Berger 300 Hybrids and N570 which I hadn't been able to find previously (had been using H1000 and Retumbo)

Vhitavouri's load data has min/max over a mile wide- from 65 to 85 grains. We do typical OCW workups usually, for those of you using this bullet/powder combination where would you start and what increments to work up?

 

[Rebelirons]

I just did load work for the exact setup. 30” Bart, Atips and n570. I ended up at 89.5 gn -90.0gn. Laser accuracy with speeds around 2850 fps. All the bullets I tried with n570 shot great. Oddly enough H1000 didn’t work for shit in this barrel no matter what I did. I started at 85.0 grains and went up in .5 grain increments. 90.5 and 91.0 gave me a heavy bolt lift so I stayed at 90.0

 

[Rebelirons]

One thing I forgot to add is I seated .020” off the lands. My speed and accuracy improved when I seated at that length. I started at .080” off and went out till it worked