OK, this is
stirring the pot, but here's an interesting read right here on AH that may shed some light on this one
https://www.africahunting.com/threa...e-professional-hunter-proficiency-exam.14931/
Yes ... I was thinking of that article, from the start of reading this thread. Mind you, pressure problems can occur with smaller cartridges as well. When I ran a small club range complex for 14 years, the worst chamberings for stuck cartridges where:
.308 Winchester, .243 Winchester, .223 Remington and 7mm-08 Remington.
The root of the chamber pressure problem appears to have been the introduction of the 7.92x57S cartridge by the German Empire in the early 1900s. The introduction of the deeper Z rifling in July 1896 and the doubling of bullet jacket thickness for the S bullet (in combination with rechambering of Z barrels to allow for the fatter bullet) removed the barrel wear, barrel splitting and occasional action shattering issues related to the rapid introduction of the 88 rifle and ammo but over enthusiasm created another issue!
The Germans went for as much extra velocity as they could get and one example of over-reaching was the need to standardize a carbine, the 98az, during WWI, with a 60cm (23.6") barrel to mitigate severe muzzle blast. The U.S. Army, unfortunately, decided that they had to follow the Germans and altered their new .30 caliber cartridge to create a 30-06 loading with similar pressures.
The end result was a mania for creating cartridges with maximum allowable pressure limits of 50,000 to 52,000 c.u.p. The fact that the high pressure military loadings were primarily created to shoot to 1,000 yards or so was ignored. The fact that most of the high pressure military ammo development after WWI was concentrated on .30 to 8mm tracer and armour-piercing ammo for use in heavy machine guns was also ignored.
Yes, the higher pressures are useful for belt-fed machine guns and the purpose built single-shot rifles used in 500-1,000 yard competitions but when you load hunting ammo to those pressures it is a bit like using nitrous injection in your car whilst driving to your local shop for some milk and bread.