Who has AR500 Plate?

How do you tell if it is ar500. Hit it with a grinder and look for something special with the sparks? I might have some, but don't know how to tell for sure.

Well its definitely not a science but hit a plate of what you know is mild steel with a center punch and hammer and take note of how easily you can mark the plate and how deep. Then try the same thing with the piece of steel you suspect to be of a higher grade and you will very quickly and clearly be able to tell if its any harder. The harder plate wont mark nearly as easily or as deep. It wont tell you if its ar500 but it will show you how much harder the plate is.
 
Anyone know how AR400 would stand up to a 338 Lapua?

Thats all that I have found around here. 3/8 and 1/2 inch.

Sorry for the hi jack. :redface:

If I remember correctly AR500 is not much harder than AR400. QT400 is a little harder than AR400, I might be wrong its been a while since I looked this stuff up. 1/2" QT400 should work but it also depends on how far you will be shooting.
 
General Steel in Edm had a 4x8 sheet of AR400 about two weeks ago. Can't remember exactly the price as I was able to source it a bit cheaper though a non retailer. Having some enemy sillouettes made from 3/8'' AR 400. Will see how it stands up to 300WM.
 
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