Every November, we have a Halloween Shoot, where we attempt to dismember our old Jack o'Lantern from 300 yds.
Our most favorite reactive target of the last 6 years or so has been "dingers" made from old railroad support plates found in the dirt. (Don't even think about using the ones that could even be construed as "somewhat" attatched to the tracks!) These things are about 7" wide by about 11" long, by about 3/8" to 1/2" thick and have 4 square holes in them for the railroad spikes to go through to attatch them to the ties. Their steel is fairly mild, but for pistol practice, they are great. They weigh about 7-12 pounds, depending on their thicknes. If you have a post or a tree at your ranch, you can hang them up with wire, and they swing well and make a lovely clang! when hit. Only problem is that anything above a 30-30 will punch through at 100 yards. At 150, '06 won't go through unless it's FMJ at a perpendicular. Makes a great fouling round at 300, and a nice "parting shot" for the day. If the sun has gone down and it's in the shadow, it often will shoot off some impressive sparks.
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Will you, too, be one who stands in the gap?