I've been debating what height to get myself. I've heard varying reports of whether the 6-9" models will work w/ the S&W banana mags from a bench. Is this just due to variation in bench height and body geometry and posture of the shooter?

I'd like to do a little prone shooting as well, but most of the bipod's use scenarios will be from a bench at the outdoor range or kneeling using the low-ish ledge at my indoor range to plant it. I've been using the long edge of the mag as a rest to take up around 1/4 of the weight so far.

Best to try 6-9" first or the 9-13"? I'm 6' 2" if that makes any difference.