I am having a timing problem. Everything feeds fine and chambers fine on the forward stroke of the bolt, but as the bolt comes back the next round is fed too soon and slides over and is struck by my feed lug as the feed lug/bolt comes back. I was wondering how the timing is on a mg42 or m60 or mg34. When does the next round advance? Within the first 2-3" of rearward travel? or after the feed lug is completely past the tray? I could make the lug spring loaded so it rides under the round as it passes under the next round in the tray, but this will be a major PITA.
Now before you ask what I have, it is almost all hand built, my own design. I just did not quite get this part right.