FWIW...
Its alot easier to "quick do the math" on the running shot if you already have a "Known Starting Point" like 3-4 ft lead at 100 yards for a perpendicular runner and can then adjust for fire conditions. Its just like knowing your holdover for longer distance as well when your scope is zeroed for 100 yds...
Doing the math ahead of time still helps considerably. Also helps to keep you honest if you shoot different FPS armaments, to know what each one is capable of to begin with. again, just like holdover for longer distance.
Doing the math doesnt solve all your errors, there is wind to consider as well and other variables that slip in there.
Gut shots happen... Ive made them myself Im sorry to say. And theyll happen again, thats the odds. Sometimes that means not shooting, sometimes that means quick-calc'ing to help the shot before squeezing.
Its hard to hit a "home run" if your not "In the ball park" to begin with...
Robb
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"Happiness... is a Target-Rich Environment"
