Just yesterday I finally got around to shooting an initial batch of Berger 230gr OTM's in my 300 WM Sendero.
I traded for this used barrel just for the heck of it. So, I have no real baseline on accuracy or history.
Nonetheless, I'm pleased with the initial results as per the following photo...
This was just an initial ladder at 100yds with 2@ a .5 gr steps.
Win brass new, FL Sized and no other sorting or prep.
Fed GM215M primers.
Seating was .010" jam.
I had 2x bottles of RL22 ~1/4lbs remaining each that had been sitting around a long time. So, I gently mixed and used that.
The Berger supplied data in my previous post indicated 67.9 max for rl22 @ 2700 fps. At 67.5 I still had no signs of high pressure and velocity was lower than Bergers QuickLoad forecast.
I'll probably just load 10 at 64.5gr and 10 at 66.5gr to see if the groups stay tight.
I had a bunch of ERR readings on the chrony before I figured out it was the goober next to me that was disrupting my chrony and I'd forget to reset it.
If the accuracy remains consistent, I'll shoot it to 500yds. And, seek out an accuracy node with better velocity using fresh powder.
Even though these are not sold as hunting bullets, I've seen a couple of hunting reports and may give it a go on some hogs.
-- richard