Yes, lots of great long shots here. BTW, welcome here Rog.
My shot on the antelope doe i took this yr. was about 230 yds. or so, not very long by the stds. that have been set here, but i did have the opportunity to check a fast point blank range rangefinding system that i'd set up for the tgt. size and optic i was using, AND IT WORKED!
I was using the Leupold Varmint Hunter reticle in a 4.5-14x VX-III. The max. point blank range on an antelope doe was about 275 yds. with my load where it dropped about 3.5" from line of sight. I knew that the measurement (subtension) between the 1st and 2nd stadia lines is 2.43 inch per hundred yds. @ 14x, which becomes 2.75x that @ 275 yds. or 2.75 x 2.43 = 6.68 inches. The avg. doe antelope is 14" back to brisket, so i had to adjust the scope's power down to open the gap between the 2 stadia to 14". Nice thing about it all is that it's inversely proportional, i.e. as magnification DECREASES reticle subtension INCREASES. (this is an easy 1 since the scope power is 14 and the tgt. size is 14 so it's easy)--
14/6.7 = 14/x
x=6.7 power
...now if i hunt with the optic set on a lower power that's calcd. for a quick rangefinding system (6.7x) then all i had to do is quickly bracket the doe if she's standing broadside, and if she's as big as the bracketing gap or bigger then just aim dead center and shoot. If she's just a slight bit smaller than the gap she's probably approaching 300 yds. or so, so aim a little high and shoot.
Sure enuf we ran across a herd of does that spooked as we were getting set up to shoot. I picked the biggest one and watched her thru the optic. When she stopped i immediately saw she was a bit bigger than the bracketing gap, so i knew i could aim dead center and hit her in her lungs. I aimed slightly high since i could see she was probably on the long side of the PBR zeroing system and nailed her high in the shoulders (actually had a little help from XPhunter when he called out the lasered range to me, BUT had he not i have enuf confidence in the system that i would have used it had a laser not been there).
This is the quickest, rangefinding system there is that gives a decent degree of accuracy (at least better than guessing), and it appears to work since this is the second time i've tried it and it worked both times.