Friend of mine has a cooper 257 weatherby Mag 1:10 he can't seem to get a good load for. He's tried barnes TTSX and another that I forget. Anyone use the 98 or the 92 on deer size game yet? He's pretty limited with the 1:10 twist. I'll have to ask but I'm guessing he didn't specify a twist or certainly a 1:9 would have been in order.