Has anyone flown recently and checked a long gun? Specifically Delta? Email, online chat, phone chat...I can't get a straight answer on gun case size limits and cost. I can find on the online calculator that a "speciality sports equipment firearm" is just $30; no mention of weight or dimensions. If not speciality equipment, oversized baggage is $340 ONE WAY for the case size I plan to bring. Customer service is unable to tell me what I'll be paying. Thank you for experience if you have it!