People just think they recoil a lot
Horsepuckey, at least WRT the M-38.
I shot my M-38 along with my .30-06 hunting rifle (walnut Weatherby stock with recoil pad, IMO the best stock ergo's for me, bar none, vs. the M-38 original stock, about the worst stock fit of anything I've ever shot, plus a steel buttplate).
Of course the round is about like a .30-06. It's the gun that makes the difference. I shoot a fair number of shotgun rounds through various guns, and one thing you learn from shotgunning is that stock shape and fit matter a LOT, both for practical accuracy and for perceived recoil. A lot of rifle shooters don't even know what stock fit means, but shotgunners can be obsessed with it.
I could shoot my .30-06 all day. Not the M-38. Recoil as experienced by the shooter is influenced by a lot of things other than the round!
The narrow, sharp-edged, plate steel buttplate, the relatively light weight and the utterly terrible ergonomics of the carbine added up to a hurting shoulder. I don't give a crap about the show a gun puts on -- I learned to shoot a rifle using a .50 caliber muzzleloader with a brass crescent buttplate. I judge by how my shoulder feels after 10 rounds, not by the muzzle blast, flash, smoke, etc.
Now, put a Limbsaver on the thing, and it does improve a lot, both because of the padding and the longer LOP.
But if someone wants to do volume shooting, I'd go with the full-length rifle, not the carbine.
Or put on an aftermarket stock, though that kinda defeats the purpose of shooting a classic.