What’s the difference between a choke and a tube?
The choke controls the constriction at the muzzle. The tube (or subgauge insert) is a sleeve that fits inside the barrel in order for you to safely shoot different gauges from a single gun. Each tube is machined to a specific gauge -- like the gun barrel itself.
These tubes don’t work with pumps or semi-autos because the receivers are gauge-specific. For example, you can’t load a 20-gauge shell into a 12-gauge pump or semi-auto receiver under any circumstances. With your over/under or side-by-side, however, the shells are loaded directly into the chamber. Crack open the gun, and the proper set of tubes can turn your 12 gauge into a 20-, 28-gauge or .410 shotgun.
There are plenty of options when it comes to finding the perfect tube set for your shotgun.
Some shotgun manufacturers bundle tube sets with a new gun. For retrofitting, tube sets can be purchased over-the-counter while others have to be sent to the tube manufacturer where they are fit to your gun. You can go with a full-length set of tubes or shorter chamber-length tubes.
Your decision is usually based on price and weight.
Full-length tube sets can weigh 5-12 ounces, affecting the balance of your shotgun. But if you’re a nose-heavy kind of shooter who believes the extra weight improves your swing, then these tubes are for you. Other shooters balk at the extra up-front weight, and may opt for shorter tubes.
Into the Chamber
Chamber-length tubes let you reduce your gauge preference without going for a full-length version. When you fire, the subgauge shell then patterns with a 12-gauge barrel. How does that affect your shooting? Some manufacturers swear that there’s no penalty whatsoever -- or even go as far as to claim an improved pattern compared with an original subgauge shotgun.
Given their size, these chamber-length tubes are less expensive than the full-length alternatives and are obviously lighter (3-4 ounces).
Regardless of which tubes you ultimately use, there are a few cautionary measures to consider. Make sure your shells eject properly and your chokes still fit. If you’re using chamber-length tubes, you also have to examine if the ejectors start moving them out of the gun. Hunters will want to verify that their tube sets can accommodate 3-inch shells as well as steel shot.
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