I have often wondered if I might have had awful luck, but I must say, the only failure I have ever had with a Mk3 was one broken extractor spring. I pack a Mk3 now, 1911 vintage. I live in bear country, so it gets loaded and unloaded constantly, sometimes several times a day in the Summer. I have never had to shoot a bear, but I have complete confidence in the Mk.3 should the need arise. The problem with the SAVAGE bolthead guide channel cracking seems to be quite common. I bought my first SAVAGE from a small dealer about a decade ago. I didn't have it long when the rail sheared. A friend bought one, too, and a small chip cracked out of his at the front of the slot. Just enough that the bolthead flips up if you work the bolt too fast. When I brought this to the dealer's attention, he inspected his remaining rifles. He found that most of them exhibited at least some chipping of the release slot, and a few had whole pieces chipped out. He sent me the MALTBY for free, to replace the broken SAVAGE. He also sent another BRIT action to replace my friend's rifle. Since my SAVAGE action was B.E.R., I experimented a bit with it. A LIGHT tap with a small hammer was enough to break the entire guide rail off! The whole rail snapped away in one piece! This would seem to indicate an over hardened acton, similar to the EDDYSTONE P14. As I stated before, I have observed only a few LB rifles with chipped slots, despite seeing many more LB than SAVAGE rifles. These SAVAGE rifles were in original condition, with all Savage and LB wood and metal. They didn't show really hard use, either. The fact that these rifles could be brittle should be considered, when handloading for them. My experience soured me on SAVAGE No.4's so badly, that I no longer want to shoot them.