I looked at the scope mount and there seem to be some differences. Appearantly the front left notch on the .223 barrel has a small ding.
It also seems that the holes on the right side are flared on the .30-06 barrel and not flared on the .223 barrel. I'm going to attach some pictures of the gun to clarify.

Thanks for the cleaning tips, drover. I'll look into the bore scope. Seems like a decent investment.

And I measured the twist rate, which came out to be 1:12

[Linked Image from i.ibb.co]
[Linked Image from i.ibb.co]
[Linked Image from i.ibb.co]
[Linked Image from i.ibb.co]


They don't make 'em like they used to

Don't tread on me

Nothing runs like a Deere