Meister: Remember that with any conical, you have to fit the bullet to the actual diameter of the barrel to get accuracy. With a round ball, you can patch the difference, in most cases, and get acceptable accuracy. Any slug will shoot well enough out to 30 yds, and usually out to 50 yds. to hit a deer sized target. I wanted to see just how accurate a smoothbore Deer gun shooting slugs ( foster style) I could make, and my barrel will put 5 slugs into one large hole, off-hand, and a very much smaller hole off a rest, at 50 yds. After 80 yds, when the slug comes down through the sound barrier, groups begin to open, and I was obvserving " flyers " at 100 yds. 4 shots would group fairly well in a 4 inch circle, but one shot would be off by as much as 10 inches, in each 5 shot group. I even had other shooters shoot the gun, thinking I might be developing a flinch, and I had other shooters watch me to see if I was flinching, but nothing changed. The flyers were in the ammo, and not the shooter. I found the same thing, BTW, shooting Brenneke slugs. I consulted a friend about this and he noted, pulling a couple out of his long held collection, that occasionally the screw that holds the wads to the base of the brenneke slug get drilled a little off center, and he showed me a couple of them. I don't spend my money on expensive slugs anymore. As for my Foster style slugs, from Winchester, my friend showed me that there are often nicks in the skirts of the hollow base, that either allow a piece of the base to break off, or which send the slug out of hte group at the longer ranges after the slug gets buffed by air currents as it comes down through the sound barrier. He designed his own slug, and it shoots very nice groups, even at 100 yds. He's killed deer at 175 yds with it.