JohnS1976 wrote:Anyone know if those Briley extensions can handle slugs? is a 410 the same as 12 gauge? The wall thickness looks pretty thin.
I would assume they would handle any commercial load unless otherwise specified, but I would suggest asking them direct. You would also want to confirm they offer it in a choke thread that fits your barrel.
I did see that it said .410 but it looks far too wide to be a six-inch .410 extension, to my eye at least.
Shotgun barrels have very thin walls anyway.
I don't think longer barrels offer significant ballistic advantages in shotguns as they burn relatively small charges of very fast powders at very low pressures, half the pressure of .22LR.