The front sight I ended up with was .250 Williams. It also has a smaller fibre optic which I feel is nice. I was shooting the 460NE and wanted to sight in at 120 yards. I can go to any size conical now but might have a problem with sabots (might be too low). The 460 NE sometimes fall out of my barrel, Did it three times Tuesday both on a clean barrel and a fouled barrel
Redclub