11-10-2011, 01:00 AM
An LMG will have a much larger bolt, and won't be limited by AR mag-length COAL. There also won't be a need to save the brass or case for reloading. Basically, you're looking at bolt gun velocity potential, and my friend is getting 2650-2700 fps with 139gr Lapua Scenars out of his Cz527 Grendel, so a 130gr at 2650 should be quite doable.
