There is nothing wrong with the 770 as compared to any other low cost budget rifle. but quality has defiantly gone downhill for all the Remington products, their entire line has suffered in the quality control department. (from the 870 to the 700 even the ammunition leaves a lot to be wanted.) I am a bit of a prude when It comes to firearms seeing 90% of all my guns are custom built by yours truly. all My factory guns I have bought off the shelf I have turned around and replaced triggers, barrels, trued actions, lapped luggs, glassbedded, etc. I load all my own ammo because most factory ammo sucks and the rest of it is still mediocre.
but going back to their rifles. here Is where I think that the quality has suffered the most. not just in their budget rifles but their entire line. all their barrels are junk. their actions aren't true. triggers are creepy, lugs require lapping etc.
The performance of even their long range rifles is pretty much limited to the average big game hunter who takes game at less than 500 yards. To me that is fairly mild range Long range starts after 1000 yards.
After saying that, Yes you may have a decent 770 but from experience it it is pretty much a crapshoot whether you get a decent rifle or a wall ornament. and while we are on this subject why don't we look at some of my favorite old rifles Marlin lever actions... Have you seen what happened to the quality control is on these ever since Remington bought them out? (in case you didn't know Remington bought Marlin some years ago, fired all the techs, and had all the equipment shipped to their factories) since then the quality has been horrendous. Bad stock fitting, bad bolt machining, bad sight mounting (the scope mounting screws are visibly misaligned, Bad chamber tolerances, etc)
I No longer buy anything factory from Remington. If I want a Remington style action I have it custom built.