I'm looking for suggestions for an extreme long range hunting caliber. 338 Lapua, 338-378, 408 Cheytac, etc. Also, what actions can handle these calibers or will have to go to a fully custom action? I currently have a Rem. 700 built by Bobbly Hart in 30 Hart and a Savage F/TR 12 in 308. I'm looking for something that can throw heavy bullet(220 gr.+) well over 3000fps. Has anyone heard of or seen a 338 extreme? Any suggestions will be greatly appreciated.