Free: Contests & Raffles.
100 grain TSX or TTSX bullets out of a 257 Weatherby have worked very well for me in Wyoming. Heavier bullets may "resist" wind better but they are slower, so wind has more time to move them. I doubt you would enough difference in wind drift to justify a 140 grain if you can even find such a thing. I would rate accuracy much higher than bullet weight.
120 is as heavy as I've seen in 25 caliber, not that there aren't any, but I haven't seen them. Not sure why you'd want to go heavier than 120?
Anybody try the 80 gr TTSX? I've had a box for about a year and haven't loaded any yet. Should be able to push em to 4000 fps, talk about a deer killin sonafabitch!!
After pushing a 100gr tsx through a couple elk and a few deer and having none stop the bullet and none take so much as a step......I will just hold another inch into the wind. I love shooting long sleek heavy bullets, but keep it real.....the Roy was meant to run hard and fast and sting like lightning.