I found Winchester 3", 1 ounce at 1,770fps to be quite accurate in my rifled 24" bl. Mossberg, M835. When I say quite accurate, I am referring to a 2" hole for 5 shots offhand at 30yards, open factory sights, U notch and front bead sight. The 'fosters' can be quite accurate out of some guns, smooth and rifled. There is actually a plethora of slug loads nowadays.