I am in the unenviable position of not owning firearms to go deer hunting and I am not in the financial position to consider buying a deer rifle at this time.Last year a friend loaned me his 30-30 Marlin which is unavailable to me this season. I have two realistic options of getting loaner guns for the rifle season.
1. 12 gauge shotgun (unrifled I believe) with slugs
2. Older model muzzleloader (not inline) .45 caliber

Both gunshave open sights
I know that there are lots of variables in this equation but generally what would you choose to use in this situation? what would you consider a reasonable effective range for either gun?

Thanks for reading my post