I got a used colt Delta Elite at a gun show today for $800. It was really dirty and oily. I cleaned it ral quick, got most of the big stuff and headed to the range. Other than a few FTLs it was ok. Most of the problems I think may be the reloads I was using that I bought at the gun show. Well when I got home I was playing with it and found that if you try to fire it when the safety is on, and then take the safety off, the hammer drops to the half cock position. Is that normal or did I pay for a defective gun?