SuperBalistite M...Powder made by Baschieri & Pellagri in the early 1950's, later sold to Alcan.
This blue colored powder is in the form of tiny lamels that thoroughly burn even. It has good ballistic properties and owing to small shares required insures inexpensive shooting. It is moisture proof and requires only very light wad pressure.
1953 Lyman Ideal Reloading Handbook No. 39
Powders for loading Skeet, Trap and Light Hunting Loads:
12 gauge: 1 oz. - 17 grains B-P Super M
12 gauge: 1 1/8 - 16 1/2 grains B-P Super M
16 gauge: 7/8 oz. - 14 grains B-P Super M
16 gauge: 1 oz. - 13 grains B-P Super M
By 1955 and 1956 it had sold to Alcan. The Super M Balistite is listed in each of those years loading handbooks, including 1958 and 1959 with the loading remaining the same as shown above, with no changes, other than the B-P initials dropped. Lyman/Ideal Handbooks 40, 41 and 42.
I have all the Ideal and later Lyman Handbooks from 1898 up through 1970 should you require any information on obsolete powders.
This was all before plastic wads, so the wads used, which are not shown, would have been fiber/card and felt wads.
Hope this helps.
Best,
