Quote:
Originally Posted by milanuk
Ya know, I love discussions like this. By that sort of math, my gun would barely be able to hit the target, much less put 'em in the Xring on anything resembling a consistent basis.
Actually... errors don't stack linearly like that. In theory, they maybe *could*, but your chances are probably better of hitting the lottery. Root Sum of Squares (RSS) is a better method for figuring out how errors add up:
TotalError = sqrt((Error1)^2 + (Error2)^2 + (ErrorN)^2...)
or in this case...
sqrt((10)^2 + (6.5)^2) = ~11.9
Then add in that E.S. is a lousy measure of consistency, mathematically speaking. It's easy to calculate and simple for the average person to understand, but it gives too much (all) weight to two 'outlier' data points  the ones statistically least likely to occur on a regular, repeatable basis  so the actual effect on target is (in my experience) rarely as drastic as predicted by simply plugging the high and low ES numbers into a ballistics program.
There's something to be said for considering absolute worstcase scenarios where you would experience the actual total ES spread between two sequential shots, stacked squarely against the absolute worst possible spread between shots in the group... if you like worrying yourself into a lather and an upset stomach
YMMV,
Monte

Monty .
I like good debates also and I am not offended buy your comments just because I can't shoot a 1
hole group at 1000 yards like you must be able to do because if you can ,then all you have to
do to shoot a perfect 1 hole group is to have a rifle capable of Zero MOA and a standard deviation
of .0000 and then shoot a perfect 1 hole group at 1000 yards and you will be the best there ever
was and the best there is!!!!!
I was shooting when you were still crapping in your britches and I can tell you that you have to add every variance to what the rifle would do in perfect conditions with no wind ,no mirage,perfect
temperature,perfect shooting position.zero SDs, perfect load densities, perfect brass and sizing
procedures,perfect bullets,And so on.
It is quite simple and Jethro math is all that's nessary "NO ONE IS PERFICT AND NEATHER IS
THERE EQUIPTMENT " or everyone would be shooting perfect 1 hole groups at 1000 yards
like you , so trying to flame me is a wast of time and you would be wise to spend your time
trying to convince others of your math skills and leave the shooting to those that can.
I was taught that the reason we have two ears and one mouth is that we are supposed to
listen twice as much as we talk in order to learn and I try to learn something every day and
don't spend time trying to flame everyone that I disagree with and spend the rest of my life
swimming is the shallow end of the gene pool.
J E CUSTOM