I have a sporter 1903 I bought a while back. I had not done anything with it. My son decided he wanted to try to get us back in service. It is a mix of blued and chromed? Parts on the bolt and trigger guard. He watched videos and took the bolt apart and cleaned it oiled it. We tried to fire it and nothing. The safety won’t engage so assume maybe something is worn or out of alignment. When disassembled, safety moves to all 3 positions. Once assembled it only slightly moved to the safe position. Any ideas? I saw I could buy a new complete bolt on Nimrichs for about $85. Best option?any help pi’s appreciated.