I have a model 16 ss in 270wsm with 24" barrel. It shoots Remington 130gr sp rounds great but I can't get it to shoot barnes 140tsx at all they keyhole no matter what powder load I try. I called Savage and gave them the serial number and was told that the barrel is a 1 in 10 twist. when I run a brush through the barrel it only rotates twice making me think that it is a 1 in 12 twist. Any help with this problem will help. I reload and want to work up a 140gr load with barnes tsx bullets.