Having shot a 91/30, an Enfield #4, and a Steyr-Mannlicher M-95 carbine side-by-side, the hands-down winner was the M-95. Those flyweight little carbines boosting a 200+ grain bullet to 2500+ fps definitely rattles your teeth.
It is to be noted that the other two guns were full-sized/weight, but I still think the M-95 hits the hardest. It's really light. Both Mosins and Enfields are rather beefy guns, and are still heavier than the M-95 in carbine format. IIRC, all three shoot a similar-weight bullet, i.e. 174 grains in .303, and 192 grains for 8mm Mauser, at least later in the war when the Germans had standardized on the heavier-bullet MG load instead of the faster 148-grain rifle load.