Friend of mine tested some of the Smoking hot HP:s in his IJ-18 rifle.
Powder was VV N310 and the loads where 6, 8 and 10 grains.

Penetration to a wet newspaper was about 6 inches.

He also tested the same bullets with silicone filling in the HP cavity..


Penetration was about 5 inches.

Holes in the paper..


Left is with silicone filling and right the plane HP.. Depth is about an inch from the surface..

The allow in these where almost pure lead with some little added tin.

S

PS. Sorry about small size.. That was it when I got the pics.