I routinely shoot with 2 friends who own Bushies. They both have experienced FTF, boltovers, etc with their guns when they were new, using good mags and ammo. I've seen both of them go for the Leatherman to remove a badly stuck case. Both friends had problems just before we attended a PFDC carbine course, most of which were worked out as the new BM uppers they had purchased were broken in. The only (unpremeditated) jam experienced during our recent PFDC course was with one of these BMs. The 2 preban Colts used ran fine, as did a single RRA AR15.com LEGP. 2 of 3 BMs ran without a hitch during the course, in which ~700+ rounds were fired in 3 days by each shooter.
The BM used by my friend Chris, which experienced the single jam during our night shoot, also has a tight mag well. He used Orlites, which are the only mags which drop free in his gun(!)
Another of my friends, ICU on this board, took a new BM with a flattop superlite upper which was only sighted in just before the course. It ran fine.
I think Bushies are generally a good gun, but I far and away prefer my late 80's, early 90's grey Colts. I've shot a fair number of rounds through my Colts over the years, and I've had virtually ZERO problems with them. I can't say the same for the few Bushmasters I've seen.