I dug few of my cast bullets from a tree trunk that I occasionally use as target holder, you know walking with my hunting dog in the woods....shooting from field position...photos prove toughness/bonding of polyester coating.
Photos....
All the bullets found today were shoot 6-12 months ago. I am adding few photos from few months ago...same trunk.
MP copy of H&G#503, MP HG#278 and 357-130 NLG