Don\'t believe everything you read
Finally got out to the range with my Christmas chrono, and had some interesting results.
I was shooting my Savage 16FLSS in 300WSM, 24" 1-10" twist barrel. The load was 67.0gr of RL22 behind a 180gr CT Ballistic Tip, with a CCI 350 primer and Norma brass. This not max by any means, but is very accurate in my rifle, and has done well on the few critters I've shot so far.
The Nosler manual (5th ed) lists this combo as 2972FPS out of a 26" 1-10" twist Wiseman barrel with Winchester brass and primers. I'd expected to lose maybe 100 fps for the shorter barrel on my rifle.
I got a 5 shot average of 2779, with a 34fps extreme spread and 13fps SD. So I'm running about 200 fps slower than the book and 100 under what I expected. I'd shoot about 4" lower than I thought at 500yds, and farther out doesn't bear mentioning. Oops.
Guess the moral is, if you don't have a 1000yd range handy, there's no substitute for a chrono if you want to know where you will hit at distance.
There is no "overkill". There is only "open fire" and "I need to reload."