I agree. You get out to four digit ranges, say 1100 yards, being off by 15 yards (about 1 %) = a shot 12" high or low....that is with a 30/210 vld at 2950at ele 1300/30 degrees. 12" is HUGE on an antalope and deer.
You need to know EXACTLY how far the target is!!! a GOOD rangefinder is the only way to go!!
Already said, I porbably wouldn't recommend this for 900 yd shot, but for an *elk size target* at 600 yds it would probably work.
Sorry...i just saw your chart (or what I could make of it), saw 950, and assumed it was a yardage.
I guess I shouldn't assume!!
No worries, it was 950 yds, I was having fun with my calculator
I was thinking about testing this technique against a laser range finder. I could take a range finder and my rifle to Yellowstone and find some elk to range. Ya think the rangers might get a little bent out of shape?
Actually MR, that really would be a great way to practice it (with just the scope--less the rifle). Just take a notepad to write it all down and u could calculate percentages later. That is basically what i do when coyote hunting during the winter. I always see antelope so i range them and take a reticle-reading, and usually calculate later when i get home.
Don't know if i should post this or not, but i went out today coyote hunting, and had the opportunity to reticle-range an antelope buck that lasered right at 600 yds. avg. of about 2 readings. He occupied back to brisket what i guessed to be .9 of the distance between stadia line 2 and 3 of the Burris 4-12x Mini's Ball. Plex reticle. Here's the calc figuring 15" back to brisket, and subtracting the line thickness (.19 inch per hundred yds.= 2.78 IPHY between stadia lines).
15 x 100 / 2.78 / 0.9 = 599 yds.
...but if was only +/- 1/20th off in the interpolation (.85-.95) here's the range of error--
1500 / 2.78 / .95 = 568
1500 / 2.78 / .85 = 635
67 yds. error (also assuming the buck was actually 15", and not 14.5 or 15.5).