JeepHammer
Moderator
You have already found out one thing you should know!
Good job on owning, and checking, more than one reference!
First off, misprints abound!
When the high/low difference is 19 grains in a 25 grain case, suspect a misprint!
Also, keep in mind the test fixture barrels used to obtain the printed information are different (shorter, worn, whatever) and your milage will vary, good excuse to buy a chronograph!
Work the load UP, you will usually find best accuracy below maximum charge anyway, and it let's you look for over pressure signs along the way. Good excuse to go to the range too!
No references will agree completely, some from the same source will even change from year to year...
Where ever you buy powder *Should* have paper fliers from the manufacturers of the powder, pick these up (FREE!) As supplemental reference material so you can double check charge weights.
They are FREE, and they come in REAL handy.
Good job on owning, and checking, more than one reference!
First off, misprints abound!
When the high/low difference is 19 grains in a 25 grain case, suspect a misprint!
Also, keep in mind the test fixture barrels used to obtain the printed information are different (shorter, worn, whatever) and your milage will vary, good excuse to buy a chronograph!
Work the load UP, you will usually find best accuracy below maximum charge anyway, and it let's you look for over pressure signs along the way. Good excuse to go to the range too!
No references will agree completely, some from the same source will even change from year to year...
Where ever you buy powder *Should* have paper fliers from the manufacturers of the powder, pick these up (FREE!) As supplemental reference material so you can double check charge weights.
They are FREE, and they come in REAL handy.