If you go to S&W's website you can get a manual for free.
if this is there 455 cal gun its about $200 if clean
Ask a gunsmith for assistancee.
Yes.
Yes, I have one
Ask a gunsmith for help and S&W for an owner's manual if you don't have one.
What model?
1865
Need the serial number to answer.
No
No, no, no. Do not attempt to do this.
NO
100-450 USD