the saiga, in 16 in bbl version, is under 8 lbs, I do believe. Having had two of them , they are also both moa capable. I did it all the time with milsurp ammo, Either former british empire ammo, such as singapore, american, australiian, american, etc., NOT INDIAN!!! Also all the former S. american nazi stuff was very good, i.e. venezuelan, chilean, argentine.
One of my best shooting gigs, was with the Saiga. At the 100 yd line, I loaded up my 4 mags, I had modded them, to take 10 rounds, instead of factory 8. I put a 3 inch cirlce , shoot n see target out at 100. I then proceeded to fire all the rounds in the mags, reloaded, fired again, and reloaded two more mags, and fired them off. 100 rounds. With the standard open sites, I hit that 3 inch target 96 times. That was an average of one shot per 18 seconds, though it was actually much faster, since I finished with about 5 minutes to go, plus I reloaded. it really came off like 1 shot per 7 to 10 seconds. So I would also say, that unless you are just freefire pulling the trigger, i would not worry about heating up the bbl so much, that you lose accuracy.