Rats
It took me a couple of minutes to understand the MIS understanding.
I was talking the Hornady also BUT should have typed HBTSP.......... instead of HBT.
That ONE lot of Hornady BTSPs I had were too stout on the bucks I shot with them. They opened but NOT enuff for my liking.
This was prior to 1986 so obviously I would think Hornady changed the jacket design.
No Harm, No Foul
Jerry