b1g b0re I don't know much about 50's but the holland QD will tame a RUM down to the 243 range in recoil or less depending on weight of your rig.
Before Kirby installed my Holland my RUM would make me want to end load development at about 20 rounds in a day.
Now I'm launching 20 to 30 grain heavier bullets and have shot as many as 50 in a day without any tenderness or anything.
I compare the felt recoil now to a heavy barrel 243.
Guns and ammo, what more do we need?