Below are photos of a plain white 25 round box for 12 ga. shells with spars information rubber stamped in black ink on the front of the box.
The red plastic shot shells are low base brass (brass plated steel?) and the case is marked “BLOCK BUSTER” along the side of the plastic hull.
This belongs to a friend and in my haste I forgot to take a photo of the headstamp, but as I recall it was somewhat generic without a specific name.
In the last photo you can just barely see through the plastic hull what appears to be some shot (#7 size or there about) mixed with small plastic beads/granules.
U.S. Munitions is mentioned twice in the IAA Journal:
#393 page 9-
#469 page 39 shows a drawing of an all plastic shotshell attributed to U.S. Munitions
Can anyone provide additional information on U.S. Munitions?
My assumption is the BLOCK BUSTER round was an attempt at a door breaching round for the law enforcement market. Can anyone confirm this was the manufactures intent for this loading?
Any feedback, corrections are most welcomed!