The muzzle of my 24 inch barrelled Sako 85 is .633 inches. On the light side of a sporter weight barrel. It shoots okay and is a good carrying weight at slightly under 9 pounds with a sling and the magazine full. Slightly less that 8.5 pounds empty with a sling attached.

The quick detachable rings were 500 dollars. They work well enough. Another consideration.