Mine works fine at under 100. Hand loaded 240grain lead bullet, out of a 10" SBR with a Costal can!
Out of my "pig stand" 100 yards is the farthest I can see.
200 yard subs, not me... Supers out of the SBR/can, at 200, YEP!
Avenger Firearms 214-577-5818
Lifetime NRA member