looking for some target material that I can make a swinging target from. I already have one made out of 1/2" carbon steel plate that swings in a pendulum action when struck. However, even at 300 yards my .300 WSM and .243 WSSM are blowing clean through the 1/2" plate. I'm told I really need to armor palted steel for this. Anyone, have any suggestions? I don't want to spend a ton on this. Would stainless steel work in 1/2 -3/4" thick.

thoughts??