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WesternHunter's picture
Joined: 05/05/2006
Posts: 2374
whats with conflicting load data?

Could be length of barrel affect or maybe not. Those COMPLETE RELOADING MANUALS for one caliber are great because they pull data from a number of other manuals for that caliber. However, I suspect those one caliber manuals may have some obsolete data from one or several other component companies. Various component companies update thier data a various times, and those one caliber plastic spiral bound manuals may have missed that newer stuff. I know that's the case for the IMR Powder section of my .270 Win manual.

Location: Colorado
Joined: 11/09/2005
Posts: 164
whats with conflicting load data?

Remember, too, that some of the manufacturers do their testing with an actual rifle while others use a test barrel. Combine that with differences in chamber tolerances, brass, primers, what-have-you, and these kinds of dramatic differences are really to be expected.

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