Haven’t picked up my hard copy 2019 Regs yet, but OR 2018 Reg reads, under Muzzleloaders: “It is illegal to hunt with centerfire primers as an ignition source, the muzzleloader must have an open ignition.”
The question is a 209 shotgun primer considered a “centerfire primer?”
We do have distinct “shotgun/muzzleloader” hunts, so there is at least some implication that shotguns and rifles are different, and thus maybe the primers are also viewed as different by ODFW.
Regards,
Buster