<P style="MARGIN: 0px">60 yards is an awfully long distance to be shooting, particularly with steel shot, due to the relatively low pellet count. You did not indicate whether your choice of BB's is for ducks or for geese, but I will assume it is for geese.</P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">Back about 1995, a friend and I did some penetration testing using BB's in a handload of his which was chronographing over 1700 fps. at the muzzle. We got some Lima telephone books and soaked them in water overnight. This gave us a thickness of about 4 or 5 inches, uncompressed. At 50 yards, the BB's blew clear through the books. At 65 yards they only penetrated a little over 1/2". There was such a fall off in penetration in that extra 15 yards that I decided not to use them in preference to the BBB's I had been using in my 10ga. The BB's, in my opinion, did not allow sufficient penetration for much of an error in range estimation.</P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">That season, my friend proceeded to use his BB load at 1700 fps. while I continued to use my BBB load at 1500 fps. Standing side by side while pass shooting, he would repeatedly hit geese but fail to bring them down, while my BBB loads would drop them like rocks. Later, after I got a laser range finder and had a chance to range them as they were passing over us, we discovered that we were habitually underestimating the range of the birds by an average of 20 yards. Had they been truly 50 yard shots as we believed, his loads would have brought them down, but they were not, they were further, and his BB loads lacked the power to give the body penetration drop the birds at the longer ranges. He has subsequently switched back to a 1500 fps. load of BBB's for his pass shooting with much improved success.</P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">I have seen geese killed with low velocity BB's at over 100 yards, ranged with a split image optical range finder. However, they were killed with head and neck hits and Lord only knows how many were wounded to kill those brought down. You can usually tell a head or neck hit at long range by the bird immediately folding up and dropping toward the ground, rather than flying or gliding off some distance before folding up or landing. </P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">I regard 50 yards as about the limit for reasonable success with steel BB's for body penetration, providing they are high velocity loads (1500fps.+). And frankly, I have not often seen a 12ga. capable of putting sufficient quantity of high velocity BBB's in a 30" circle to be reliably effective at 60 yards. The closest I have seen is with Kent 1 3/8 oz. loads using the .675" Terror choke, but even with that combination, the patterns are pretty thin at 60 yards. The patterns with BB's would be sufficient for snow geese at that range, though.</P> <P style="MARGIN: 0px"> </P> <P style="MARGIN: 0px">In answer to your question about chokes, for a reasonably priced choke for long range shooting (>40 yards) in the Invector Plus bore of the SX2, I would try an extended Briley light full. My friend is now using one, and the improvement in his patterns using steel 2's, BB's and BBB's over the factory chokes was amazing. I have a .675" Terror for my 24" barreled BPS3.5" 12ga., and while it patterns much better than the Briley in my gun, I never tried it in his 30" barreled BPS3.5" 12ga, so I don't know if it is any better in the longer barrel than the Briley light full. Frankly, the Briley extended light full patterns so well in his gun with those loads, there's not much room for improvement.</P>