....
His final comments on the issue was to simply to round it off to 450400---it was more than close enough for the purposes at hand and that if anyone thought FPE was an accurate measure of killing/stopping power that they needed to get a hell of a lot more real world experience.
You and he are entirely correct about it not being a good indication of stopping power, but it is available and advertised, so it winds up being used for comparisons. As saddlesore mentioned, Colorado specifies downrange energy as a criterion for legal taking methods. Actually, I often use 450,400, because I tend to remember the product of g and 7000 as 225,200, apply the 2 and get your number. Whatever works....
