ODFW made a change to the muzzleloader regs for 2019. It removes the bullet length and jacketed bullet restrictions from the regs. Only thing prohibited now are sabots or any thing with plastic on it. Change is in bold/italics. If you have a fast twist rifle like a Gibbs the change makes it workable in Oregon now. "Muzzleloader During muzzleloader only seasons and 600 series hunts where there is a weapon restriction of shotgun/muzzleloader only or archery/muzzleloader only: It is unlawful to: • Use scopes or sights that use batteries, artificial light or energy except for visually impaired hunters with a permit (see page 23). Open and peep sights are legal, including open and peep sights with fiber optics or fluorescent paint on them. • Hunt with or have in possession while hunting, sabots or bullets with plastic or synthetic parts. Cloth, paper or felt patches are allowed. • Hunt with centerfire primers as an ignition sources; the muzzleloader must have an open ignition. See definition on page 87. • Hunt with pelletized powders or propellants. Granular (loose) black powder and black powder substitutes are the only legal propellants. • Hunt with a revolving action muzzleloader. During centerfire firearm seasons, hunters may use muzzleloaders with any ignition type (except matchlock), any legal sight, any propellant, or any bullet type provided the weapon meets caliber restrictions for the species."