As far as protecting the shooter in the event of a catastrophic case failure, the actions, best to worst, would be 700, Mauser 98, pre-64 Winchester M70. The 700's "three rings of steel" work. The Mauser is almost as good, except for the extractor cut. The casehead is almost enclosed, and casehead projection is less than on the Remington, or the Winchester. The M70's breeching is copied from the '03 Springfield, the casehead is hanging out in the air, and the receiver doesn't have the internal collar of the Mauser. The coned breech of the barrel helps smooth feeding, but does less than nothing as far as safety is concerned. I have inspected a .22-.250 700 fired with a steel rod in the bore. The bullet stopped in the barrel, the casehead had essentially melted. Bolt and barrel were ruined, stock was intact, the shooter was absolutely unharmed, apart from being rather shaken. Try that stunt with a 70, and you'll get hurt. Look at the photos in PO Ackley's books of M70s with their receiver rings blown off.