Combat weapons endure severe duty to put it mildly. Try to imagine sitting in a fighting hole in the rain, with only your 100 issued rounds, with thousands of Huns coming at you with every intent to kill you by whatever means possible - and not one of them to be a pleasant experience. Those 100 rounds will go very fast and you will never notice the recoil. At that point, you must kill or be killed with no opportunity to take a break or think things over, and you fight with what you have in your hands. It is usually a rifle, a bayonet, or most often, an entrenching tool. If you give out physically, you die. Combat rifles are treated without any regard to collector's value.

Side note:
General Smith, co-author of "The March Up", is nicknamed "E Tool" Smith. He earned that name by killing numerous NVA and VC with his entrenching tool. It is a very effective weapon, and will kill with a single blow. Just ask the men "E Tool" hit with one. By the way, it will be a very long distance call.

Crossbolts in sporting weapons are usually limited to very heavy recoiling rifles. Some, like the 460 Weatherby, have an aluminum rod epoxied into the stock through the grip area in addition to crossbolts and a barrel recoil lug. In comparison, the recoil of a 30-06 is pretty minimal.

Not one of my rifles, except for the Springfields, have crossbolts; and I have never had a stock crack.

Jim