Hi Splash
How do you find your 260 with heavy 140gn and up bullets, I understand that there can be problems with these weight bullets in a repeater based on a 308 length action, because of the long bullets have to be seated too far into the case and this compromises power capacity in the case. Is this a problem in your rifle? It is supposed to be a good cartridge with 95 to 130gn bullets.
Best rgds
Thar