Long WalkerI have used three .35 Whelen rifles, and they have given me good service. A Remington 700 with 1-16" twist, a custom Ruger #1 with 1-14" and my current Sako AV classic rebarreled with 1-12" twist. I only shoot 250 grain bullets, except for fooling with 225's a couple of times. All three shot well, all three were effective on game, all three could safely reach 2500 fps / 250 gr. with IMR 4064 or Varget or RL15. I like the 1-12" twist Sako the best, not because of the twist but because it fits me the best. So I got rid of the others. Would like to try the new Speer loads with CFE223 powder, but actually find I have no need for more speed than I already get with the older powders.
Try the Speer loads with cfe223 you will be very happy with the extra performance and extended range. It will be just as accurate with that load maybe even more so. My Whelen cuts clover leaf groups with their load.
Cheers mate Bob