Re: Change a 5.56 to 6.8?
I have both a 5.56 and a 6.8, I use the 6.8 for hunting and the 5.56 as a precision rig. I've driven the 6.8 to 1000 but it's not meant for it and doesn't do so well past 700. I consider it a 0-350yd small-medium game cartridge--great for deer and hogs. As a HD cartridge I also think the 6.8 is superior, DOCGKR developed a document that was floating around that showed the terminal capabilies of the 6.8 vs 5.56 and there was quite a difference. The other element was touched on by some of the other posters---the 6.8 excels in SBR's and burns most of its powder in the first 8" of the barrel, the 5.56 not so much. I like to shoot my 5.56 because it is very accurate, has minimal recoil, and is still pretty inexpensive to shoot. However, when terminal ballistics matter I like the 6.8 a lot more.