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The problem with the 740s, and to a lesser extent...the 742 and 7400... was something about the guide rail (think that is what you call it) in the receiver. The bolt would wear it away over time... rendering it more and more a jamomatic. There was something else...had to do with the rotating bolt head. Each later model had more grooves in it. From my understanding...the older 740s in 30/06, 270, etc, were the worst. The long action calibers would just beat themselves apart.Back to the regularly scheduled programming…..
I had my great grandfathers 740 30-06 for a time. Probably killed my biggest deer with it. But best I remember I had a time with it and the bolt wanting to seize up. Probably didn't help that it sat for years and years under a family member's bed. I don't know who has it now, but I hope they've oiled it good. I don't remember it shooting bad either, just jammed a lot when I first got it