Home Forums Hunting & Shooting General Big Game .257 Weatherby culling results.

It appears, looking at these results, once a certain bullet mass/S.D. is reached, high speed terminal performance seems to stabilize. And, like George said, he wasn't pushing them at warp speed; I think that's the key point.

My thinking: when you get into larger calibers, you shouldn't see a terminal performance "velocity ceiling". .264 may be the break point caliber. I push 120 TTSX and E-Tips at high speed in the 26 Nos. S.D is .246, up from the sub .20 S.D.'s, 80 gr .257 and .243 TTSXs.

I have moved on from using llight monos at high speed on game, would think Model70guy has as well.

The Nos runs 120 monos at 3,450 fps, not 3,800, a more balanced mass/velocity ratio and quite effective on game. I'm not sure if the higher S.D. or the inability to push a 6.5 120 gr. TTSX at 3,800 fps is the biggest factor. Maybe some of both.

DF