Again for the Pelican 1750. I havent flown with mine, but I put my rifles in the case and throw it in the bed of my truck... I do a TON of off road driving for work, so I tend to drive my truck like a work truck off road (hard, faster than should be, but dont beat the piss out of it). Moral of the story, the Pelican protects my rifles and scopes perfectly. I also used a carving knife to trace my rifles, they are almost TOO snug as they take a little work to get them in the foam properly.
Electric carving knife. I buy new foam at the fabric store for different configurations