Thanks, guys! I guess the main difference is in the mind of the gunsmith/builder and/or the customer.
I'm a "'good' is good enough" guy, probably one good reason WHY I'm NOT a gunsmith or machinist. Many gunsmiths and most custom builders are more of a "perfection is ALMOST good enough" mindset, and willing and able to pay for it with time, skill, and dollars.
My offset chamber .22 LR and .22WRM insert barrels used in the shotgun barrels of combination guns to make them rimfire and centerfire double rifles certainly wouldn't "win a rimfire benchrest match." They do kill what I point them at very well. "Good enough."
