I found this an interesting result
The hole was made by a 22-250 using 55gn projectile, the other marks on the plate are from 222, 223, 308 and 338 Lap I would have thought the Lap and 308 would have done more damage if not penetrated but being Hardox 500 I wouldn't have thought any of them would have penetrated to be honest so was very surprised the 22-250 achieved it whilst the bigger stuff didn't.
This lot are made by 308, 223 and 22-250 - what I noticed was the 308 and 22-250 had pretty much the same penetration depth but the 308 of course had a slightly larger diameter hole for obvious reasons but penetration was pretty much the same on the plate (I think we were 200m or 300m away) can't remember now but I was surprised to see how similar the penetration depth was but I would imagine that may well change the greater the distance became (well I assume that would be the case)