Lewis’ grease groove bullet . 80 gr powder , 50 cal felt wad triple 7 primer
knight Ultralight 1:20 twist. 300 yard gong. Wind was worse than I thought as I was way left on the gong. I didn’t realize how windy it was til I watched the video and saw the grass blowing. The ultralight I have is close to a true .450 or maybe .4505 as I sized the bullet to .4496 for a firm but slip fit .
I had a hard time trying to get this video stuff to work . Not to good in that area. Camera was my Nikon p900 with a 60x zoom . I didn’t chrono the bullet do it was just a wild guess . I was actually worried as the hole on the 100 yard target looked weird but it hit paper at 200 and then the gong but I want to shoot through some cardboard and see what the hole looks like. I think it might have just been the paper target that caused the tear in the hole

This is the weird tear I was talking about .
These two shots were when I was sighting in the scope as I just put a Nikon omega on it

IMO its the paper itself that tears that way. Stuck to a backer that likely wouldn't happen. Thick targets show better holes without tears I think.

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.

The target is stapled to a pallet. I think it right over the gap between boards of the pallet. I will use a sold backer next time out . Besides if it wasn’t shooting good it sure wouldn’t have hit the gong I don’t think