An inexpensive way to practice with you competition guns. This liner is offset so it does not use a shell holder adapter as in the other but instead uses your rifle's center fire firing pin to directly strike the cartridge on its edge. Extraction is then quickly accomplished by the use of a small screwdriver. Available only for the 40-65 Win., 40-90 SBN, 45-70, 45-90, 45-100, 45-110, 45-120 calibers ONLY.