Don’t know why browning went with a fast twist .270 win they are one of the architects of the 6.8 West. The 6,8 Western is what the 270 WSM could have been. The 270 win doesn’t have the powder space and in some rifles the magazine COAL, to shoot the heavies. The 6.8 Western is one of the few cartridges out there that are designed to shoot the high BC, heavy for caliber modern bullets. The mono is an inferior bullet for longe range hunting. Should do its job well at medium range. Personally, with the elk I shot with a mono, didn’t do enough tissue damage to cause a massive blood loss. Although the elk went down on the first shot.