reload data conflict

[Aifwikir]

Howdy
This may be a little off topic for here but I asked this question on the M1911 forum and was told Hornady doesn't make a 230gr XTP,,,

http://albums.photopoint.com/j/View?u=1551676&a=11770398&p=50547077&Sequence=0

QUESTION: Why is there 3 different load ranges for WW231 in 3 different books for the same weigh/type bullet? Even Winchesters PDF data file has conflicting load data. (?)

230gr XTP(JHP) @ ?.?gr WW231= 850fps

If someone can shead light on this I would appreciate it.

Those people over at 1911 forum sure like to tell people they're wrong.

Thanks
:D
Aif

[BUFF]

The data differences have to do with the tolerances between all of the components, firearms, reloading equipment, standards and technique used by all of the data authors.

No two data authors use the same exact firearms, even if they use the same make, model, barrel length and finish of gun for example. In the older Speer manuals, they used to run a chapter where they rounded up about 30 different .357 Magnums, everything from 2-1/2" revolvers to 10" T/C Contenders and 20" Winchester Model 92's, and they shot them with 4 different lots of .357 Mag ammo. The velocity range between 2 "identical" .357's with 6" barrels could be 150 fps. It was interesting.

The data in the various manuals are just a starting point or guide. A smart reloader will have several current manuals or manufacturer's data, and will look at them all when trying a new powder or bullet. You need a plenty strong reason to go above the maximum charge found in any of them.

[W.E.G.]

Hey AIF!

The answer is that the burn-rate varies between lots of the same "type" of powder. When I was super-heavy into shooting M14's in competition, several of us had different lots of 4895 that produced a WIDE differential in velocity between lots.

That's why the standard wisdom is: start low and work up with any new lot of powder.

The factories make their best guess at what formula will duplicate the previous lot. But, when you are dealing with nitroglycerine, a minute differnce in the formula makes for a big differnce in performance.