quote:

Originally posted by bpesteve:
Hello Zeke -

I have a copy of "Hodgdon's Reloading Manual No. 20" which doesn't show a publication date, but it does have a number of 12 gauge loads for 2-3/4" shells and either 1 oz or 1-1/8 oz (nothing heavier) of shot using Grey B. Nearly all of the listed loads use built-up wad columns instead of plastic shot cups. I'd be happy to send you pictures of the pages if that would help.

The inside cover of the manual has this to say:

"And now - the only powder developed exclusively for the new plastic cases and plastic wad columns. Grey B will allow you to duplicate factory, red plastic shells ..."

Evidently Grey B was not on the market very long and the powder you have must be 50 years old or more - keep that in mind!

quote:

Originally posted by Lamar:
the powder pre-dates plastic shot cups by just enough years, there'd be almost no data for it.

but if your adventurous enough you could use that stacked card/cork data and cut it back 2 or so grains to start from with a plastic wad.