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The gauge of a firearm is a unit of measurement used to express the inner diameter (bore diameter) of the barrel.
Gauge is determined from the weight of a solid sphere of lead that will fit the bore of the firearm, and is expressed as the multiplicative inverse of the sphere's weight as a fraction of a pound, e.g., a one-twelfth pound ball fits a 12-gauge bore. Thus there are twelve 12-gauge balls per pound, etc. The term is related to the measurement of cannon, which were also measured by the weight of their iron round shot; an 8 pounder would fire an 8 lb (3.6 kg) ball.
Gauge is commonly used today in reference to shotguns, though historically it was also used in large double rifles, which were made in sizes up to 2 bore during their heyday in the 1880s, being originally loaded with black powder cartridges. These very large rifles, sometimes called elephant guns, were intended for use in India and Africa for hunting game.
Gauge is abbreviated "ga.", "ga", or "G". The space between the number and the abbreviation is often left out, as in "12ga".
I have a bunch of Winchester AA hulls
$.15 apiece for the 12 and 20 gauge
$.20 apiece for the 28 and 410 gauge
Located near Lakewood. If this post is up, they are still available. Let me know how many you wish. Thank you
Looking for 28 gauge hulls and wads! Let me know cost and shipping cost if not local within reason. Please PM or text me at five four one seven zero one four four seven one would be the fast way to get a hold of me. Thank you for your time! Tying1On
Selling a never used Franchi 28 gauge semi-auto shotgun. This is the quail unlimited edition and is in 100% blue book condition. The gun comes with a soft sock sleeve. Asking $1,400.00. Please contact Kyle @ (541) 891-1240 for more information and/or pictures. Located in Klamath Falls, OR...
I want try reloading shotgun shells. I shoot sub gauge for medical reasons (ICD) and of course for the challenge! Lots of 12 gauge stuff out there ... but don't really want to spend half a press price to convert it to 20 or 28....
Looking to start simple, MEC 600 seems to be the baseline...