Another way to do it is to use the reticle itself. If it were me and i had a 450 yd. shot here's how i'd do it. I know that the shot is between the 3rd and 4th stadia @
3) 7.2 MOA
4) 10.5 MOA
...that means there's 3.3 MOA space between stadia (what i refer to as a "subtension unit"), and 8.85 MOA is 1.65 MOA more than the 3rd stadia (8.85-7.2 = 1.65). So just divide 1.65 by the total "subtension unit" you're working with (3.3) and u get 0.5. Now your hold would be 3.5 (3rd stadia down and .5 further down to the 4th).
Believe me when i say that an interpolative system of guessing tenths of a subtension unit can be accurately referenced. I've already seen this 1st hand when my wife and my mother used the system for their 425 yd. gps. they shot with an AR by referencing between stadia. It's also the same system that the mil-dot guys use when they're ranging with their reticle.
Before u use this system tho, it's a good idea to measure the reticle subtensions as accurately as possible. It wouldn't be the 1st time i've seen ballistic reticles that weren't accurate--especially with the advertised plex post tip subtensions. Mine are quite a bit different than advertised.
What i usually do is use reticle to it's subtension limit, then turret beyond that using the lowest reticle stadia as my zero reference. This usually gives me all the accuracy i need with the reticle then more accurate turret reference beyond that range. Be sure and verify the lowest stadia's zero tho. If that's not accurate then the turrets certainly won't be either.
Last edited by sscoyote; 03-22-2008 at 09:30 PM.