Steel plate thickness for .243 caliber

[COROVICD]

HI,

I want to make a backstop at 110y,100m) from a steel plate. How thick would it need to be to take .243 bullet over and over again?

regards, dejan

 

[rednek]

Really it would depend on material type. If you are using just cold steel i'd say probably 3/8" or 1/2". But with an AR type plate instead of cold steel 1/4" holds up all right for me, shooting .243 with 100g bullets.