just ran thru a pound of Alliant "Steel" shotgun powder in the 223, 20 Practical and the 243...yielded 500 rounds out of a pound of powder in the 223 load, using 14 grain charge..

This has a slower burn rate than Blue Dot ( a little slower)

it is temp stable

is as bulky as Unique, which is bulkier than Blue Dot

it is as accurate as Blue Dot

if anyone has Blue Dot data in the above listed chamberings,
I found in my rifles that "Steel" can use the Blue Dot Data safely...

another feature Steel has over Blue Dot... you can find it on the shelves, unlike Blue Dot...

just passing on an FYI for anyone interested...