ORIGINAL: bigbulls
A longer 28 vs. 26 inch barrel in a shotgun isn't going to add any velocity at all. In fact, a shotgun will burnall of its powder in less than 24 inches.
x2
People still have this engrained in their minds that longer barrels mean more speed and more distance and more accuracy. Especially about shotguns with longer barrels throwing tighter patterns and shooting faster. Almost all modern shotshell cartridges are burning all of their powder by 18-19" of barrel. I cannot imagine that slugs would be much different. Back in the day of slower burning charges, the longer barrels did in fact shoot faster.... but technology changes things...
Typically when people ask at the shop how much farther a 28" barrel will shoot compared to a 26" barrel... my answer is of course.... 2 inches
