My 300 Fireball is dedicated to subsonic ammunition and is never used without the sound suppressor. After predator season ends this month, I plan to have the barrel shortened to reduce the overall length of the weapon to make it more convienent to get through the woods, to transport, and to improve the balance. It presently has a 16" Olympic Arms barrel. The functioning gas block is actually beneath the hand guard. The one seen in the picture beyond the hand guard is fake. I plan to do away with it during the barrel shortening process.
What reduced length is recommended (10.5", etc.)? Any disadvantages to a shorter barrel? Will the gas port have to be relocated after the barrel is cut off? I am familiar with applying for a tax stamp for a sound suppressor. Any details to applying for a short barrel rifle? Can I go ahead and apply now so I will have the permit by the time I get the barrel back from the gunsmith?