Lots of good info in this thread, and its nice to see no arguing yet! Really like this forum. My opinion is anything 6 or 6.5 mm would be hard to make an ethical kill on big game with at 1500. Probably could tip over an antelope! If there is something out there I'd love to see the load and ballistics though. 7mm are the most efficient bullet till you get into the bigger chey tec's or 50's of course. A 7mm 180 Berger is quite a beast coming out of a 284 mag and 30" barrel but don't see enough energy in my loads to kill a big deer or elk/bear at that range. The 7 RUM is one of my favorite hunting guns (probably favorite actually) and shooting 180's with a 28" barrel may get you very close to what you're looking for, but at that point you can run almost everything the same cost wise and shoot the 338 edge (dies may be slightly more but that is so minor it's hardly worth considering). Brass, bullets, powder, etc will all be so close, and gun component costs will be pretty much identical as well. I shoot mine with 300 gr Begers and wouldn't hesitate to take anything I hunt (up to elk) at the ranges you're talking. I'm doing 2950+ out of the barrel and feel very safe with this load. I do have a mag system for it but generally am single feeding for max length on my long throated chamber. Keep us updated on whatever you get, and most of all have fun! Remember there is no one perfect gun, so I prefer to build specialized pieces of equipment that do one thing really well (my 338 edge has a 33" barrel with the brake and weighs in at the max western hunting weight so not exactly a carry gun but it shoots).