For years I have owned Remington 788s' in 7mm-8 and .308 without any problems whatsoever; great accuracy! Recently I acquired one in .243 which is a great shooter also and after a few hundred rounds no problems occured. However, the prior owner "dremeled" off about a quarter of each lug (3) on the top and right side of the bolt when it is in a locked position because as he says, he experienced headspacing problems many years ago and he has not had any after that modification. There are still 3 good lugs on the left side. Somewhere I read about headspacing problems with the 788 in certain calibers but never had any myself in the 7mm-8 or .308; I shoot factory ammo only. As I said, I have not experienced any problems while shooting this one in .243, it is a real tack driver! But is it safe? New Bolts are soooooo expensive!