I have a 338 GNR Encore that I really like. It is a 405 Winchester necked down to .338. I'm shooting a full bull 15" tube that has been Mag-na-ported with a Burris 2 x 7 Ballistic Plex scope. I have only tried 200 grain bullets and I'm currently shooting Nosler Accubonds at 2667 fps. That's pretty good out of a 15" ported barrel. I've taken a Fallow deer at 155 yards and an Axis deer at 100 yards with this load.