I have one made by Cooper and it's a fun gun. Good for coyotes up to 300 yards. Never heard of it being referred to as a barrel burner before. Saubier.com is a good place to go for small caliber related info.
It is a neck down 221 fireball. Super flat shooter, lazer like accuracy. Definetly a barrel burner though, have a friend that burned his out with HOT reloads and has been searching for another one for years. Not easy to find. Remington stopped chambering for this years ago. Ammo is not easy to find either.