I ended up with the 135gr Berger flat base over 67grs of IMR-4064 and a 215M primer , accuracy is around the 1/2 moa mark velocity averaged 3729fps . The Ballistic tips shot ok but I don't think they liked the long jump to the lands. and the TNT's just would not shoot for crap.
We rode around a little bit looking for somthing to "blow up" and found two feral cats at about 75yds , the bigger one took the round square in the chest and just popped !! looked like a 1lb praire dog shot with a 50gr V-max at 4000fps about 30 min latter an armadillo took one at a touch over 200yds and had the same result. the Bergers shoot very well at this speed , I probably could crank it up a little more but don't see much point.
The bullets I'm using are the regular flat base varmint bullets they offer , they all have had the hollow point drilled out a little deeper though.
the gun is a Sako L691 wioth a 26" 1-11 twist Obermeyer barrel , its chambered and throated for the 190gr SMK bullet and is a fast barrel generaly running 50-75fps faster than any other 300 win with the same barrel length and same load !!
I'm gonna try this load on some small pigs (50-75lbs) that are causing a problem just to see what the bullet does in a bigger target.