I have just inherited an old .264 Win Mag 24" with a 1:9" twist barrel (making bullet choice difficult). I intend to hunt Elk at some point soon in the NW (mountains mostly), and I want a reliable bullet that is going to keep its Sh** together at very close ranges (sometimes as short as 50yds) but still rock a lung shot through a canyon (300yds is as far as I'd currently reach for an elk). I've read a lot of forums but they tend to be for either a 26" barrel or 8"twist. I wouldn't feel comfortable below a 140 gr bullet unless you can prove a 130 has the ft-lbs and weight retention to get it done. I'm also curious about using a slightly faster burning powder to make sure the bullet is reaching best velocity by the end of that short barrel. Any and all help, knowledge, and advise is greatly appreciated!