My hat's off to the guys that can hit movers at 30 mph, that's all I can say!!
Interesting stuff!
I use Exbal to figure the lead, and usually leave it set to 1 mph so I can use multiples of that calculation if needed.
Using it to figure angled shots is one thing I find real quick and handy.
What can we do with the reticle by changing the power setting?
Concerning Exbal, its reticle optimization feature will tell you what power setting will zero the closest tick mark to the "exact" range you have entered into it... no clickin needed. OR it will simply tell you how far off the POI will be for each tick mark from the POA if using a tick mark as a POA crosshair.
Tell it you're changing the power setting to what ever setting you enter and it will show you how much closer the POI is now to POA.
This type of modifiable chart in the field is just too **** cool for the average LR hunter... like me.
As S1 explains it here too, the R2 is quite an exceptional tool for many situations or styles.
http://www.perry-systems.com/palm.htm
Interesting to know these formulas and why they work the way they do but, some of that stuff is more than anyone has time to figure in the field, even if they knew the TOF for various distances etc... isn't it?
Ranging with the R2 takes a little bit of research into height and width of certain body features on animals you're hunting before hand while scouting and such but, for the most part ranging it's straight forward and simple math to do in your head in just seconds before the shot is taken. How well you learn the exact height and width of those things that need to be "bracketed" in the field is what will likely determine your accuracy in the field. I use a LRF and the R2 to acertain the sizes from a distance, as I can't always measure them on a dead animal. A young adults body size will throw you off alot let me tell you! The more data you collect, the better!
Something to consider:
Your possible amount of error in yards added to another possibly "stacked" error eminating from a reality based group size at whatever range the target is at would dictate weather the shot would be an almost certain kill.
For example, first assume two things;
1) You're always able to hold an 8" group at 800 yards consistantly.
2) The size of the body part you're bracketing for ranging purposes with the R2 is always within 10% of the size you have logged and are doing your figuring with.
You now are ready for a shot at 800 yards but this shot will be an extreme "low in a group" shot, resulting in a -4" low POI.
The body part you are bracketing is +5% larger than anticipated, resulting in a range estimation error that "stacks" another -8" low POI to the error amount, for a total possible error of -12".
Instead, a "high in a group" shot would of course cancel out some of the range error for a total error of only -4" low POI. However, considering a possible stacking effect of errors, it's wise to error on the side of caution.
[ 06-06-2003: Message edited by: Brent ]
