[LegendHasIt]

Unfortunately Aguila quit manufacturing that 60 grain SSS ammo. :-(

A little dirty, but I liked it.
The heaviest factory .22 ammo I can find now is 45Gr.

[Redcitizen]

Looks like Aguila still makes them.

https://www.aguilaammo.com/rimfire/

http://ammoseek.com/ammo/22lr/Aguila-rimfire-60grains-

My ruger 10/22 cycles them no problem. It doesn’t tumble either.

I like those rounds too.

[Big Red Badger]

60 grain .22...

Interesting.