I may have got a bad box. They were some I had for a few years. I shot them out of the 6x47L. One fairly close and one at distance. I shot them behind the shoulder in the boiler room. Pretty much exploded on the surface puncturing a lung. Had to finish both off with another shot. Actually a friend finished one off after it got up after tracking it a quarter mile. His old corelok 243 worked great. Bad box or not, it soured me.
The NBT has 'evolved' and gone through a number of upgrades as it were. If it was a number of years ago, try them again..
I swore off them shortly after their introduction till JB talked me into trying them again. BIG difference!
