These Knock out slugs combine the hollow-point design with a soft lead for maximum impact and energy transfer.
Thanks to the design of this slug, it has a high BC so that it retains its energy for a very long time, for a tighter bullet trajectory with more range.

This variant of the JSB Knockout slug is of the sub-caliber 0.217".
Because slugs behave considerably differently in a barrel (also different per barrel) it is important to experiment with these sub-calibers.