Has anyone tried these in a single shot shotgun?
12 gauge and 20 gauge to pistol centerfire calibers.
I think you used to have to buy the whole set for $350 now available separately.

Chiappa X-caliber inserts


Edited to show picture of a set of 8 x 8" 12 gauge inserts

Interesting...

did a little research and those will only work on their x-caliber gun. At first i though it would work on any single shot

So the adapter is 8" long, what is stabilizing that bullet the rest of the way down the barrel?

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did a little research and those will only work on their x-caliber gun. At first i though it would work on any single shot

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Thanks for the heads up. Seems odd to sell them separate but only fit their gun. hmmm.

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So the adapter is 8" long, what is stabilizing that bullet the rest of the way down the barrel?

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7" roughly of rifling then free flight out the muzzle.

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did a little research and those will only work on their x-caliber gun. At first i though it would work on any single shot

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The individually-sold adapters are ~7" long adapters (actually 6-15/16" actually, I measured one.)
I figured $42 per, what the heck.
They say 8" adapters online. I dunno maybe that was for the pack with 8? My adapter was 6-15/16".
I wonder if that was done to accommodate most Single shot shotguns?
BTW, they fit all of my single shots (all cheapos) Rossi, Yildiz and Hatfield (Walmart $99)

Chiappa X-Caliber 12 Gauge Break Action Shotgun Caliber Conversion/Adpater Complete Set

$229.92 for 8 inserts or $28.75 each in the set
Specifications and Features:
Chiappa 970.387
Caliber Adapter/Conversion Set
Fits any 12 Gauge break action shotgun
Eight fully rifled adapters
Each adapter is 8" long
Carry Pouch is included
Convert to .380 ACP, 9mm Luger, .38 Special/.357 Magnum, .40 S&W, .44 Magnum, .45 ACP, .410/.45 Long Colt, .20 Gauge