1/4" 6061 plate
Those smaller dings were from the 300 AAC 220gr subs. Handgun rounds can be identified by the larger diameter dings. No handgun rounds penetrated, including 10mm.
1/2" 6061 plate
1-1/4" plate #1
1-1/4" plate #2
Edge on shots (308/175gr SMK)
45-70 shot by tom (about 10mm deep)
308 round practically vaporized, leaving 20mm deep hole