Here is a pic of a projectile idea Rob had. We will test it later
this fall, It is 12ga bore rider design Body is Aluminum, and it
will have a heavy 50 cal insert in the nose made from tungsten
or similiar metals. In the picture he put a 50 cal bullet in for
show. The insert in the nose will be flush with front of the
AL carrier. It should be stable at slow twists and if built
with back and front same diameter stable in smoothbores.
The long lighter tail-end compared to heavy nose insert
will make it stable. Same principle Brenekke uses. This idea
is being explored to try to get superior penetration
from 12ga, with heavy, hard insert in the nose.Ed