Recently purchased a norinco SKS from milarm. Stripped the entire rifle down and cleaned it with brake clean, oiled put back together. When i had the bolt out i noticed when you pushed on the piece at the back of the bolt (unsure of proper name) that the hammer hits that pushes the firing pin forward, the firing pin itself would only move maybe a a milimeter or two out of the front of the bolt face. That seemed to be its maximum travel. Wondered if that would be enough to set off primers properly. When i took the gun out shooting along with my CZ-858 and czech ammo, the SKS would not fire off a single round, just barely dent the primers. The same rounds would fire fine in the CZ afterwards. Could i have put the gun back together wrong? Do i need a new firing pin? Is there gunk in the bolt that I cant see and need to dissasember the bolt (how do i do this) ? Should i just take the gun back to Milarm, seeing as how they are now out of SKS's all together. Thanks guys for your help.