Tried it with and without the magazine in. Bolt face is too big for the action. You can see as the bolt approaches the chamber it stops as the action narrows. The question wasn't about putting a smaller cartridge in the chamber it was would the gun cycle with the appropriate cartridge in the in the chamber with a smaller bolt. My gun will not chamber any round because the bolt face is too big to seat all the way to the chamber. But I was concerned if the sent another incorrectly sized bolt, this one smaller than 6.5PRC instead of bigger, if the gun would cycle. It appears the opinion of people is that the gun would not cycle.
Ron, I have been reading the various responses to your question in the OP. I am curious what you mean when you ask,
"CYCLE", what does cycle mean in the context of your question? To me this means that the bolt will open up, it will come back full stroke, and then close again on the forward stroke,
with/on an empty chamber!! In your OP you asked for KNOWLEDGEABLE members opinions. And.....you've gotten knowledgeable peoples opinions.
From where I am sitting, to do anything other that CYCLE your rifle other that on an empty chamber is looking for a serious, catastrophic event with your rifle. When someone starts messing with bolts with different bolt faces, head spaces and bolts from another rifle, to fire that rifle or even consider putting a loaded round in that chamber is truly a mistake of monumental consequences. A few years back at a club, a member was standing next to another shooter, that shooter's rifle exploded (catastrophic event) due to an overloaded charge, shrapnel from the bolt entered into the brain cavity of the bystander and the bystander is now seriously impaired, the shooter lost three fingers!
With something that is in question such as in your situation, I always recommend
going back to basics. I personally would go back to the original builder of your rifle, this could be something simple or a misunderstanding with what you have; human error is always present in mostly any situation. If you don't get satisfaction with the original builder, I would find a reputable gunsmith to have the rifle evaluated to tell you exactly what you have, and to ensure that it is safe to fire. I read these forums several times daily, the people who have made suggestions to you are all knowledgeable people, who I follow, and whose opinions I respect when I see and read them.