is 100m long range?
Long piece of rebar with two 90 degree bends to make a U, installed upside down, and some rubber mat cut into strips to make a hanging strap, and grade 10 bolts with big fender washers to grab the rubber straps.
I have an 8x8 and a 12x12 plate. 8x8 out to three hundred isn't too bad in steady wind. 12x12 out to 400 is for funzies, more luck than anything else, as my scope can't even dial up far enough for a proper hold, and if the wind is changeable at all, forget about it. You really got to perk your ears up to hear the ping past 300, and the delay is hilarious. In the right conditions With a switched on spotter and good scope, at 100+ its not hard to see the swirl come right down on the target.
^not really, but I was only suggesting even bothering with steel if targets were 100+ yards away. Not big targets if they're only @ 100...I like a challenge as much as the next guy.