I have an SKS 59/66 A1 rifle. The firearm is in excellent cond. It is quite accurate at 100 yards and has no issues, except one! Last week I shot 60 rounds thru it. The last ten rounds all went way high, say 6 inchs high. This week I shot 40 rounds thru it. The last ten rounds all went high again. Approx. 6 inchs high. Same ammo both times. The barrel is pretty much hot to the touch for the last ten rounds. Is excessive barrel heat the cause for this?. Before the last ten rounds everything is bullseyes, nines or eights. If I give it time to cool, the rifle, and I are happy again. So maybe I answered my own question. Anyone else ever notice this? Ever since I bought the "C" tool and zeroed it, the rifle has been a dream. Siminov did a good job. Anyone have anything to add?? Thank you gentlemen. Lee
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