Just heard back from my plate guy.
For me, one sheet of .375” x 48” x 96” AR500 is $570 ($1.16 per LB) delivered to my shop. I’m sure if I bought more (or larger) sheets I could save on the delivery charges and pull the price per LB down somewhat. As you can imagine, the more you buy the better price you can get.....up to a point. This is buying from a service center, so buying direct from a mill would save even more money, but I have no idea what a minimum order is from a mill for plate.....I’m sure it’s pretty large.
We never buy 48” x 96” because our plate machine handles 120” x 240” up to 3.5” thick. We gobble 3/8” and 1/2” plate like it’s going out of style, so a 48” x 96” plate is not the most economical way to buy.
All this being said, I agree with the guys who posted above. Unless you have the proper equipment to handle and process the plate, AND are wanting to cut some kind of oddball/custom targets that no one makes (or a massive amount of targets), you’d be crazy not to simply buy from one of the Hide vendors that do this stuff day in and day out.