I suspect that a Model 60 that functions with .22 Long high velocity (1180 fps) has a very smooth action and probably a weakened recoil spring.
The only .22 Longs I encounter in stores these days are the CCI .22 Long CBs which are loaded to 720 fps for quiet target practice.
Those do function in my Marlin 60 and Remington 66 -- as straight pull bolt action, not as semi-auto. So quiet you can hear the firing pin strike louder than the muzzle report and clearly hear the impact on an aluminum can.
I have run across ads for ".22 Long HP" but close exam shows it's actually .22 Long Rifle Hollow-Point 36gr bullet ammo (the photo of the box shows clearly ".22 Long Rifle". Gun ads ought to be written by people who know guns.
Originally, .22 Short was followed by .22 Long (same 29 or 30 grain solid bullet, but more powder), followed by .22 Extra Long with an even longer case with more powder and 40 grain bullet. Then some genius mated the .22 Long case with the 40 grain Extra Long bullet and viola! dubbed the result the .22 Long Rifle which somehow hit a magic balance of bullet weight to powder capacity for target shooting accuracy and good effect on small game for hunting. Back in the 1950's there was a price difference between .22 short, long,and long rifle. Also along the way the .22 Long commonly began to be loaded with the same bullet and powder charge as the .22 Short High Velocity. In the long run, the mass production of .22 Long Rifle worldwide made the difference in price go away and .22 LR Only made more and more sense.There are some very fine .22 Short only target guns, but .22 Long is mainly produced for the very few .22 Long firearms still in use.