I have had Led sed in the past but sold it and replaced it with a Precision Turret. For me this was a mistake, for shooting at the range or hunting it's a Gem. Zeroing scopes Led Sled is an awesome tool. After a few shots I was good to go. AEA Challenger (BIG BORE) side lever 357, BARS 150gr boat tail. Once again, the 357 showed it muscle on a spent fire extinguisher from 100 yards. After zeroing bullseye at 100 yards.