I too recommend shipping flat rate.
Several years ago I flew to LasVegas to meet my brother to drive to Colorado to elk hunt. I took him 500 405gr .458” bullets. I had them in a VERY WELL labeled and taped box in my checked bag. TSA cut the box open, then dumped the entire contents in my cloths bag. The loose lubricated bullets got SPG on my cloths and ruined most of them.
Last time I paid to fly commercial for my own business. I’ll only fly commercial if someone else is paying.
I’ll rent a car, and pay more to avoid flying commercial. In 2018, I drove a rental from W.Ga to Kerrville,Tx to avoid flying commercial. Good thing as my Scheduled flight was delayed and then Canceled. Would have taken me two, maybe three days to complete ferry flight from Kerrville to Ga. that took me 5hrs to complete. (Ferried plane to new owner. I’m a commercial pilot...) The airlines wouldn’t make it if they were transporting cattle the way they treat human passengers...