I have owned only one M77, so based on a sample of 1, what can you say?
Mine is a "tang-safety version, the round-top that uses regular scope mount bases.
This is the first 100-yard group I ever shot with it, using five rounds of REMINGTON 175-grain round-nose Corelokt factory ammo with a Lyman All-American 4X scope! The aiming point is a 1" square black GI target paster.....
It shoots
better with handloads.