Sabotloader,

My understanding of twist rates is that the length of the bullet defines the slowest twist that should stablize a bullet. Any twist from there and faster should stablize that size bullet and smaller. There may be a ratio of length to diameter that comes into play but the 180 grain is shorter than the 200 .040 bullets that do shoot well in 1:28 twists so I don't think that is a factor. I know that I can shoot round ball in my 1:28 guns and get very good stability as long as the powder charge and patch thickness are optimized. I don't see any reason why the 180 grain bullet would be any harder to stabilize than a round ball, it just needs have the optimum powder/sabot setup to achieve it. Any thoughts or data that go against this theory?