Quote Originally Posted by 82boy
Powders have changed throughout the years, and what may have worked in that 1962 Sierra manual may not work anymore. You can find old loading manual at garage sales, and eBay, but I would stay away from them.
Dear Mr. 82boy

You should be shot with a dull bullet, be drawn and quartered, forced to walk the plank and have your library card revoked.

I still have a can of IMR-4831 that has a $3.95 price tag on it and I would hate to think that the new can of IMR-4831 is "changed or different".

The 1968 dated Lyman manual below is my most heavily used manual and I use it to cross check all my "new" manuals. All the pressures listed in this Lyman manual are in CUP or copper units pressure and help keep me grounded in "Old World" FACTS.

[img width=380 height=450]http://i122.photobucket.com/albums/o254/bigedp51/Lyman.jpg[/img]

How many times have you seen on the Internet someone claiming that there is 10,000 psi difference between the .308 and 7.62 NATO?

[img width=427 height=450]http://i122.photobucket.com/albums/o254/bigedp51/308-762-b-1.jpg[/img]

Below 42.5 grains of IMR-4895 at 51,200 cup

[img width=515 height=450]http://i122.photobucket.com/albums/o254/bigedp51/168match.jpg[/img]

Below from TM 43-0001-27 42.0 grains of IMR-4895 at 50,000 CUP (cup is still measured in pounds per square inch)

[img width=600 height=419]http://i122.photobucket.com/albums/o254/bigedp51/762match.jpg[/img]

Lets see half a grain of powder is going to give you 10,000 cup......... right and I have a bridge for sale in NYC.

As you can see below its perfectly safe to put 32 psi in your tires "BUT" if you put 220 kPa in your tires they will blow up and kill everyone in a 300 yard radius.

[img width=600 height=420]http://i122.photobucket.com/albums/o254/bigedp51/IMGP3024-1.jpg[/img]

If it wasn't for the "old" manuals the "old" farts wouldn't be able to keep you young whipper-snappers in line with the "new" psi transducer pressure figures.