This will be my first time traveling with firearms and my new tuff pak. I plan on packing two rifles and various other items (boots, clothing, and ammo) into the tuff pak. On my test runs I have not been able to keep the weight of the entire case and contents under 50lbs. The question that no one at united airlines can answer for me is, does the 50lbs checked baggage limit apply to sporting equipment (ie. gun cases), if so does the cubic inch limitations also apply, and what is the damage going to be to my wallet if either or both restriction apply. United airlines website to somewhat informative and I have discovered that neither first or second checked baggage fees will apply to my luggage, but the site is moot to my other concerns. Tuff pak question two is will I be allowed to pack all 5kgs of my ammo into a separate and locked pelican ammo case and then place that ammo case within my tuff pak?