Probably .45 will be the largest caliber Ill fire at the target. Primarily 9mm but a bit of .45 as well. I'ld rather spend a little more and get steel that will last then have to break welds and replace steel every 6 months. It looks like 3/8" is a better idea than 1/4" ... am I correct in saying that?
Just for an FMI... what would be required for 5.56 rounds?