Don't worry about the barrel. If it cycles properly you have a solid gun. Nothing more reliable and can take a beating and keep on ticking. Cheap as hell, fun as hell.
As for range etiquitte... Ouch
I was one of those guys first couple of times at the range. No one was to my right but the second or third trip the range was busy and I started shooting. I wasn't going all bubba and speed launching 100 rounds down range but I was popping off many rounds over a half hour. Finally I heard one of my shells pop off the rest next to me where another guy was shooting.. Not cool. I apologized to the guy for not paying attention to that earlier. He was totally cool about it but I moved to the end of the shooting line (with no bench
) and continued there.
To the haters... ffs if you don't like the gun and ahve nothing pertinent to the question being asked to offer.. let the guy get real feedback. If you think that your remi/Sako/Tula is so special great, go post a thread about it
SKS is a beater gun for a ebater price that can feed you with fun for hours at $.15/shot vs ~$1/shot for your hunting rifles.
Enjoy mate