I have not been able to recover many nps do to the pass thru i usually get but on 2 of the 3 i have recovered i have totally lost the front lead

has anyone else experienced this?

bullett weight if any one is interested starting weight 150 gr .270
180 yrds entrance front shoulder (only bone hit) 94 gr remaining buck mule deer
100 yrd shot double shoulder 128 gr remaining buck antelope
78 yrd entrance rib exit shoulder knuckle 90 gr remaining spike bull elk