This Optima runs a .501 bore.

The red sabots are friggin easy as heck to load. Im not to sure about those sabots. The yellows on the other hand load with a good touch more in pressure department but still pretty easy loading.

Tried a black crush rib and wooop! Like a greased up booger LOL.

Going to take some 110gr BH209 loads out after the truck is back to running and then see how these bullets do. Also going to try the red crush ribs for the smokeless guns as they tend to load a good bit tighter than the black crush ribs.