I'm shooting the 270wsm in a Savage model 12 with a 26in barrel, using 140gr AccuBonds and 140 gr Bergers.
I'm using 71gr of Rutumbo, Fed 215, .015 of the lands for both bullets and both shoot under 1/2 in if I shoot under 1/2in. The Accubond runs 3341fps average and the Berger 3300 fps with the Berger hitting 2in higher than the Accubond on a 100yd sight in. I'm having to stick to the 140s cause I'm 1-11 twist but I think that you would really have to push 150s to be much better than the 140s.
With the shorter barrel you may not have the gain with Rutumbo that you would with a little faster powder.
You can really tell the difference between the two bullets on steel, @ 725yds the Accubond craters
the gong but the bullets are not designed to work the same but hopefully they provide the same out come, this fall will tell.
I would definatly work up to this load, I have taken it faster but there was an accuracy loss. I have also been suprised by brass life, I have some Remington brass that are near 20 loadings and looking fine.
I am JACKED
about the 270WSM for long range on antalope and deer but for how far for elk I want to see how it does on the deer. I feel confident to 1000yds in my rig and my skills I think will be there by fall to make consistant hits.