**also shorter time of flight in the Wby makes for greater accuracy at range (less time for effects of wind, etc.) but using the 115 Berger Hunters you're at .490ish BC (.600-.650 in 133-135s but you need a faster twist.) That's why 264 (140-156 gr) makes better sense for long range. (I'd say 160 Woodleighs too-great numbers but they're no long range bullet.) High V, SD, BC. It's what the .338 is ballistically on larger stuff, for smaller stuff. You're done on deer at 500ish w/ a 257 Wby (and that weather better be stellar for that shot-no wind,) but w/ a hot 6.5 you've nearly doubled the effective range (even if you're just shooting targets at 1,000 yds, and they are shooting heavier, better ballistics at 3,300-3,400 fps!) *The large 156 gr Bergers in 6.5 will only shoot 3,050-3,150 fps, but because of their excellent BC/SD they shoot flat, retain V/E and are quite deadly (we've taken deer-antelope-sheep from 450-750 yds no problemo with the proper setup (none cheap factory rigs. Even a Wby Mark V is a factory semi-custom super accurate killer rig. I have no issue with semi-customs with proper mounts, optics, trigger, etc for longer range setups. GL Enjoy Tell us what you do! *I might have bullets (no more .257s) but I'll have to check...