Here are some steel targets.
The coyote is full size and is set at 700 yds.from my bench.
1/2" mild steel
here is a resetting target that I invented and built.But is a bit fussy you need the right combination of velocity and momentum. A .308 winchester operates it 1-200 yds 90% of the time and the .300 winchester and 7mm wsm will operate it out to 500 yds. The prairie dog target is aprox. 9" tall
and are made out of AR400
I am totally re-designing my resetting targets to be less velocity and momentum sensitive.If I get it done to my satisfaction I will be building them for re-sale.
Here is a picture of bullet impact on AR400 with a 7MMWSM with 162's at 3150 FPS. at 200yds.
my experiance with AR400 is that velocity has more to do with steel erosion than bullet weight. A .223 with a 55gr. bullet traveling 3200 FPS.at 100yds will cause more steel erosion than a .300 Winchester with a 220gr. bullet traveling 2700 FPS.on AR400 (similar bullet construction)