Apartment Home Defense

[YukonGlocker]

What YG said is mostly true. Some advantages in velocity can be gained with using Turkey or pheasant Magnum shells in guns with longer barrels. They are a slower burning powder that burns further down the barrel vs standard loads that get a full burn in the first 16-18'.
I've not done the tests personally, but have seen reviews that showed some loads were actually slower in longer barrels because the burn happened early, and nothing was gained with a longer barrel. The difference in velocity was very minimal though, and wouldn't make any difference.
A shotshell hand loader can tailor a load for whatever length of barrel that one has available.

Agreed. I've read the same things.