I have an Elcan SU-230 FDE sight on order for a 14.5" Ar.

I believe the elcan is calibrated for a 16" barrel shooting 62gr ammo, but I almost never shoot 62gr ammo.

I am trying to find out how well the BDC will match up with ammo I do shoot. For plinking I shoot 55gr m193 loads out to about 200 or 300yds. For any shooting further than that I would be shooting either a 69gr smk or 77gr smk just depending on which would match the BDC better.

I am not looking for a precise match, just close enough to hit man sized steel at various ranges. Any one have any experience with the elcan DR style optics at longer ranges? How well did the BDC match up for you, and does anyone know if I'll be better off with the 69gr or 77gr load?