Jimmy,

I don't shoot at steel any closer than 200 yds with a jacketed bullet in any caliber, this means .17 and up. It's very dangerous to get closer than that. So please don't do it.

25 yds is ok for low velocity lead bullets. NO JACKETED BULLETS & nothing over 1000 fps.

Some recommend shooting at steel with jacketed rifle bullets no closer than 300yds.

We used 3/4" T1 steel. It doesn't pit or cup, so it won't throw a bullet back at you or into the wild blue yonder.

It's expensive, my sizes are 6x6" @ 200. 10x10 @ 300 and 12x12" @ 400 yds.

Smallish but will make you a better marksman.

Be safe,

JM.

Last edited by JohnMoses; 08/23/09. Reason: cant remember thickness