The longest shot I ever made was with a T/C Renegade, .54 caliber, open peep sight, 90 grains of Pyrodex RS, CCI #11 cap, at somewhere between 80-90 yards. The trick was, the first deer was about 80 yards, the ball went through that deer and fifteen feet behind it, was a second deer... that the ball hit and broke the spine of. So both deer.. maybe 85 to 90 yard at best. I am not sure because I found out how poor of a pacer I am.
I am not a good long distance shooter. And that is easy for me to admit. Truth is easy to tell. I do not have the skills anymore to do it with open sights, and with optics, I never practice them enough to feel comfortable with.