The sabot rounds are indeed much more accurate than the Foster type at extended ranges. Depending on the brand there is a wide range of velocities available too. In the past 2 years I have shot close to 100 boxes of all the various brands available to test the differences between them and possibly do a research report on the various brands. I shoot 2 guns, a Remington 870 rifled barrel and a Ithaca Deerslayer II, with a fixed, heavy weight rifled barrel, both have 1.5x to 5x scopes installed. From what I have done so far, I have no doubt that a 200 yard shot at a deer is possible. The qualifiers are: The gun needs to be capable of the accuracy needed to hit a deer at that range. Just because you shoot a rifled barrel doesn't mean your barrel has the required accuracy at that range. You will probably have to test several brands to see which ones your gun shoots well enough. I have found that with few exceptions, neither of my guns will shoot the same slug equally. Accuracy wise, I have some groups that are a single (large) hole and under 1 1/2" I have more that go all the way up to 5" or more, all shot with sabots and from a bench. I have no doubt I could, with the right slug effectively hit a deer at 200 yards. The question is, would I try it.. I doubt it. I certainly feel comfortable of the shot at 150 yards, but 200 yards, even though possible, I would try to get closer. Just my opinion of course.