I am just getting into M/L and am trying to research everything before I purchase.

Is there an ideal eye relief... or maybe I should say minimum eye relief necessary for a scope on a muzzle loader? I am probably going with the TC Omega rifle. I am seeing long eye relief specs of 4" up to 6" on the scopes I'm looking at. Is 4" enough? Sorry if my questions may be dumb ones at this point, but I am trying to learn! Thanks in advance for any help.