Re: Crosshair positions for Long Range Shooting
You're right on. Now, go out and shoot it, and see if everything's working out right-- if not, note how many inches low/high u r at 525 yds., or set the target further out or at a shorter distance until your groups r centered on your lower post. U may have to adust mv in the ballistics program to get the actual trajectory to match up perfectly. Once the computer model matches the reticle then u should also calculate an interpolative system for the "in-between" ranges for 25 or 50 yd. intervals, like this--
Say the ballistics program matches the (6 MOA) post tip at 525 yds. Now look at the MOA drop for say 425 yds. Suppose it says 4 MOA. If u divide 4 by 6 u get .7. This means that if the buck shows up at a lasered 425 yds., then just aim 7 tenths (or 70%) of the way down to the lower post tip from the center x-hair, and u'll kill him. Do the same for all the other ranges in 25 or 50 yd. intervals, and u will have created an interpolative ballistic reticle out of your plex reticle, that's almost as accurate as an actual ballistic reticle (the interpolative system is identical to that which is used for the mil-dot for ranging). Oh yeah-- BTW do the same for windage-- that 6 MOA is an excellent subtension for interpol. windage as well. The plex reticle is the simplest of ballistic and ranging reticles IMO-- and 1 of my favorites really. Last yr. i killed a coyote @ 300 yds. in a 10 mph x-wind using an XP-100 handgun in .17 Mach IV by applying an interpolative system for the plex reticle i was using for both windage and elevation. Had to aim .6 tenths down for elevation, and a whopping 1.4 "plex units" windage. I was as proud of that "long-range" shot as any i've ever made with a ballistic reticle.