Thanks!. I will go ahead and try out a Barnes TSX 130grain next time, but the ABLR looks promising.

Next time a small batch of loads around 70grains will be in session. My former barrel(chamber) took 73grain of MRP and 150grain bullet @ 1000 m/sec. The loads here is the very first handloads. I believe a ½ grain will get to close to 1000 m/sec which indicate this chamber and free-bore might be on the tight side. Test different COLs might just be the trick. I have experienced before seating the bullet 1mm +/- from nominal COL can squeeze a group from 1½" to ½". I hope the .270Wby perform best with 150grain and no lighter. I have my 6,5x68Schüler which ought to fill the 100-120grain bullet area.