We used some of that exact stuff in Pueblo. A lot of it was so hard it was brittle. Shoot it with a 223 inside of 100 yards and it would fracture. A 308 was not as bad.

Velocity is the enemy when it comes to steel. A 20 gn 17 caliber bullet at 3800 fps does more damage than a 175 gn 30 cal bullet at 2900 fps.

I was painting a chunk of steel at a match and I actually heard it fracturing while I was standing right there. It had not been shot for several minutes.

For plinking steel, thats great stuff.