04-12-2012, 03:21 PM
Another thing about the manner in which the feed tray mechanism cycles is that when the bolt carrier group drives forward, the cam rides inside of the curved arm that moves the feed pawls, which are under spring tension so they can ride over the cartridge and purchase the next one.
After the fired cartridge's gas begins to operate the action, the op-rod and bolt carrier move rearward, which drives the cam back in the track to pull the next cartidge into the feed slot on the feed tray, so it looks like the mechanism would likely function even without modification using the Grendel case. The main issue that might come into a play is a completely new feed tray cover with a higher clearance for the larger cases, but using the same subcomponents.
After the fired cartridge's gas begins to operate the action, the op-rod and bolt carrier move rearward, which drives the cam back in the track to pull the next cartidge into the feed slot on the feed tray, so it looks like the mechanism would likely function even without modification using the Grendel case. The main issue that might come into a play is a completely new feed tray cover with a higher clearance for the larger cases, but using the same subcomponents.