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Old March 28, 2012, 12:39 PM   #10
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Join Date: August 23, 2008
Location: SoCal
Posts: 6,442
Before I got full length tubes, I shot with short inserts (Savage Four-Tenners). As I recall, there was little difference from the expansion chamber effect.

At the shotgun forum, short 12-ga inserts, in rifle and pistol calibers, are discussed from time to time. As I recall, nobody commented on the sound signature being significantly different when shooting the shorties in 12-ga barrels.

The aforementioned H&R 10-ga comes with a screw-in choke. You might fab a wiper assembly to replace the choke. It could work in most 12-ga guns, too.
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