I've been shooting the 60gr SSS rounds from the day they first came out... If you’re not shooting them in a 1-9 twist; you've missed the boat... The best bang for your buck comes from shooting them in a “1-9 twist pistol(s)” configuration; like the Ruger Mk with a Tactical Solution Tactical Solutions
conversion. This is where the ammo makes it bones... as for the 10/22; I have one I use with a Green Mountain 1-9 twist barrel. Ruger 10 22 Rifle Barrels From Green Mountain Barrel Company
As I recall Green Mountain was the company that supplied the first barrels to Agiula for their 60gr Agiula SSS Sniper Subsonic Ammunition development program. In any case they shoot great in my rebarrel Ruger 10/22 and my hybrid Ruger Mk III
I thought many times about putting a 1-9 twist on my 77/22 be, it shoots so well as is, I not sure it’s worth the time and expense. That doesn’t mean it wouldn’t be a hell of a shooter if I did; it’s just I have two (pistol & rifle) 60gr lead throwers and that seems to be enough.
I use a Leupold M8 6X42mm on the 10/22 with Stony Point aftermarket elevation and windage knobs. The Ruger Mk III is straight iron, with an option for optics… and the Ruger 77/22 Synthetic stock which has a Shepherd BC 6x18 40mm on it.
When I was living in Idaho….. I shot the aforementioned with suppressers; very quiet and very accurate in the 1-9’s I also never had any problems dispatching critters with the 60gr round.
Just my .02 on the 60gr subject.