Well that's what I always thought. But in TWO tnoutdoors9 videos, that seems to be... questionable? (videos are at the bottom in order of reference)
The first video is of a Winchester 2-3/4" 1oz slug. It makes a MEAN permanent cavity, but it broke up into 3 pieces. One piece made it 12", and the other two made it 10".
The second video is of a Remington 3" 1oz slug. This one split into three pieces as well, one going 9", another going 9.5", and the last going 12.5".
Now reference the Remington 2-3/4" 00 Buck video, he got pellets going 14", 15", and 15.5" deep. And just for reference, his 9mm Hornady Critical Duty test sent a 135 grain projectile 16.75" and a test with a .45 ACP 230 grain HST put up 13.75" of penetration. Now, obviously this isn't actual game, and there is no bone or skin to affect the performance, but compared to all his other testing videos, 12.5" is actually quite shallow. So what do you guys think? Are these results consistent with those of real-world hunting applications? Do you think that the over-penetration thing is less reality than myth, or is the ballistics "media" a poor representation of how slugs really act? Just wanted to get some other peoples' opinions on this, especially if you've hunted with slugs before.
Winchester 2-3/4" slug (space added between "you" and "tube" so it doesn't embed and make this post unnecessarily long)
Remington 3" slug
Remington 2-3/4" 00
Hornady 9mm Critical Duty
Federal HST .45