Took my SKS to the range yesterday and when I tried to load a mag, I couldn't get the mag in. Those things are always a pain, so didn't think much about it. However, when I removed the mag (never got it fully in), I could not get the bolt open. The bolt is stuck closed. I can't say 100% that the bolt did not close and pick up a round when I was trying to get the mag inserted, so now I have to assume it has a round in the chamber. Don't think so, but I have to assume so. The bolt will not budge. Any ideas on what could cause this? And how to get the bolt unlocked without taking a chance of setting off a round (that I'm pretty sure is not in there)?