M77 > American, all day everyday.
I have had a GSR and a Ruger American. I liked the GSR and agree it’s in many ways ‘nicer’. But, objectively why would it be better than the American?
Reliability? My GSR and another I was aware of had feeding issues with certain mags. If you ran the bolt slowly the cartridge would pop out of the mag ahead of the extractor and get pushed into the chamber with no extraction. You were buggered unless you could free the chambered cartridge. My American fed perfectly. I like Mauser style CRF actions but that’s mostly a biased preference. I think its touted superiority is more lore than real.
Accuracy: out of the box the American was more accurate. The GSR was mediocre until I bedded it.
Trigger: both rifles needed the return spring replaced but the LC6 trigger out of the box is poor for what became and almost $2000 rifle. The American trigger is not worse.
Safety: I think the M77 safety is mechanically superior. The American is ergonomically better on the tang.
Sights: haven’t seen the American’s irons so can’t compare.
Durability: the M77 is robust. The bottom assembly plastic might be less so over time, don’t know. The American has easy to find and replaceable mag assemblies and stocks, but they are ‘cheap’. But I have not read of any chronic durability issues on the American. Are it’s parts like extractors, cocking piece, firing pin, springs etc. prone to fail?
As a tool for shooting and a ‘practical carbine’ I think the GSR was aesthetically ‘nicer’ but couldn’t make an objective case for it being better.