30 November 2010, 11:19
garynBest Method for Setting up Ballistic Reticle type scopes
Seems each manufacturer has a ballistic calculator or other method for calculating yardage at each ballistic mark.
I would like to hear how others go about setting up their scopes so that their particular favorite load and corresponding ballistic table matches to the different points.
30 November 2010, 12:35
sscoyoteGary--i don't worry if my reticles don't match up intuitively. The main reason is that i don't sacrifice point blank range for a reticle (most call for a 100 or 200-yd. zero). I usually crank my scope to the highest power and set up the reticle system (subtension vs. trajectory) from there. I then test them to ensure that the subtension matches the ballistics profile for the load. If the trajectory doesn't match i note the MOA error at each stadia points range and then recalculate the ballistics program by varying muzzle velocity, ballistic coefficient or drag function (G1-G7 depending on bullet) TO GET THE MOST ACCURATE TRAJECTORY FIT. Sometimes it works great (to~600 yds. for most of my rigs)--sometimes not. I then create a range sticker calcd. for 50-yd. intervals (including windage) and attach it to the inside of a Butler Creek scope cap cover for the most efficient system of reference possible, and go hunting.
This system allowed me to apply the 3-9x 22 Long Rifle Rapid Reticle (one of my favorite long-range reticles)to my AR-15 coyote load, and it worked wonderfully. A shooter should always attempt to make the system work by adjusting the magnification (and consequently subtension) to get an intuitive hundred-yd. interval system as that is truly the most efficient system possible, IMO.
Here's a Sav. 243 WSSM shooting the 117 DTAC bullet at 2570 fps mv. I have the Leupold Varmint Hunter's reticle on it and here's the dope for that load--
...obviously range, vertical compensation and windage (10 mph). The red dots mean the end of the reticle. beginning of added turret compensation to reticle. With this rig i killed a coyote once at 535 yds. in a measured 10 mph wind. Actually a shot i shouldn't have taken considering that it was too much wind to shoot at game, but it worked for that unlucky fellow. Here's where i held at 3.8 units elevation and .5 windage in a full value wind from 3:00--
01 December 2010, 04:30
garynThanks Steve...It may take me a couple of re-reads to digess all your info. Thanks for taking the time to explain....
I may PM you for more info if that is ok...
Gary
01 December 2010, 23:48
scubaproif you take the Swarovsi BT you could "programm" it yourself - thats by far the best system out there...
Klaus
02 December 2010, 04:00
sscoyoteKlaus--is the Swaro BR reticle based on 3 MOA vertically for the lines? ...and is the windage the same subtension? I've seen articles on it, but can't remember.
02 December 2010, 11:50
scubaproHi Steve,
I did not mean the BR reticle - I meant the Ballistic turrent, which is a great device to compensate the bullet drop easily,
here on a scope:
http://www.titanium-gunworks.c...6i-3-18x50-p.htmland here the manual:
http://www.titanium-gunworks.c...allistic-turrent.pdfif it should be a ballistic reticle, I would also suggest to use Swarovski´s online calculator, which is very close to the real world and containing lot´s of fabric amo:
http://www.swarovskioptik.com/en/ballistic-programsor if You are a reloader, the reloading programme Quickload (which is super for load development) cotains a ballistic programme as well:
http://www.titanium-gunworks.c...ckload-software.htmlKlaus
03 December 2010, 02:00
sscoyoteThanks sir--appreciate the links/info.