Good Shootin my Friend!! I am REALLY Curious to see you Shoot Through a Piece of Cardboard, a Cardboard Backed Target. I can’t imagine your Gun Shooting this Bullet Different than both of my 1:20 Twists? I’m thinking you didn’t have the Paper Target Snug Tight against Backing? Any of these Round Nose Bullets, Be it Grease Groove or Paper patch leave a “Tear Hole” in the Target, Where a Bullet with a Decent Meplat will Punch a Perfect Hole that looks like it was made from a Hole Punch

Zoomed in on the right hole, You can see where the Bullet entered at the Bottom.