Oregon's 2014 regulations now allow the use of non-lead bullets for muzzleloader hunts. From page 30 of the 2014 regulations. The following text is printed in the color blue, indicating it is a change to the prior year's regulations:
"Only conical bullets made of lead, lead alloy, or federally-approved nontoxic shot material, with a length that does not exceed twice the diameter, and round balls made of lead, lead alloy, or federally-approved nontoxic material, used with cloth, paper or felt patches are allowed during muzzleloader-only seasons and 600 series hunts where there is a weapon restriction of shotgun/muzzleloader only or archery/muzzleloader only. It is illegal to hunt with non-lead bullets except for those made of federally-approved nontoxic shot material, jacketed bullets, sabots, and bullets with plastic or synthetic tips or bases during muzzleloader only seasons and 600 series hunts where there is a weapon restriction of shotgun/muzzleloader only."
The sticky point is that copper is not technically on the list of "federally-approved nontoxic shot" since that designation is for bird shot. I have a close friend who is fairly high up at ODFW and he says the all copper THOR bullet meets the intent and he is checking into it.
Another complication, I talked to the owner at THOR and he wants to get away from the bullets without the plastic tips. He says he buys all his bullets from Barnes with the plastic tip and has to drill out each one for the non-plastic tip version. I suspect if the demand was there, he's likely continue doing it. I may just chuck them in a lathe and do it myself.
For the time being I will continue to use 460 grain No Excuses bullets out of my Knight DISC Extreme which will shoot better than 2" groups at 100 yards with that bullet.