I tried some out of curiosity a few months ago in an 870 with an 18" cylinder bore barrel.
As previously stated, the slug was pretty close to right on, but at 10 yards I only saw one hole from the buckshot. The recoil was a bit stout, and, most importantly, the hull is longer than the average 2 3/4" and I had quite a bit of ejection trouble, as my 870 is a 2 3/4" only shotgun, and the ejection port wasn't long enough. I can't see myself buying any more in the future.