FX slug liners: Some FX slug liners want .217 and some want .218. The .218 seems to be a better choice for most liners from the feedback we have received.
Daysate: Daystate want .217 sized slugs.
Lothar Walther barrels seem to want .217 sized slugs in most guns.
These have been tested in Daystate factory barrels and M10 factory barrels with great success.
Other barrel testing coming. These work in FX Smooth Twist X Barrel Slug Liners. Do not buy these or any slug for standard smooth twist FX barrels.
Length is .336
BC .078
Diameter available in this slug: .217 or .218
You may notice a white film on the inside of the bag or on the slugs. This is lube and is supposed to be there. It helps with barrel leading and improves accuracy.