I've been shipping with Amtrack for the last 15 years or so and here is what I have learned.
Bring packing materials tape gun, foam, bubble wrap etc with you and the more the merrier.
Amtrack boxes are almost perfect size but most balloon bikes Max out with the rear fender
coming in contact with the end of the box. No bueno. Pretty much a guaranteed damaged
rear fender...... front tire comes in contact with the other end so no issues there.
I've resolved this by bringing an extra standard bike box along and an exacto knife to cut and sleeve
the Amtrack box an extra 6 inches or so. It's a bit of labor, but mandatory if you want
to ensure safe delivery. Stingrays and 20, 24" bikes......will fit in the Amtrack single box.
Since I have used AmT for shipping primarily restored bikes, I can't take chances with mishandling
or damage. I've shipped Autocycles to Evinrudes this way with no damage or claims. But I cocoon the
heck out of the bike with packing foam so that the box bulges like a balloon.
Recently however Amtrack has changed alot of policy adding new restrictions and BS, and has even gone as far as
putting a weight limit on the bike at 50 pounds. Very few deluxe Ballooners with packing
materials are that light. The last 2 years have been very very difficult shipping bikes
via Amtrack and I have tried in LA, Chicago, NY with mixed results and have been
turned down on the weight issue at locations that were once 'friendly' to heavy balloon bikes.
One solution they offered last time I was there to use 2 seperate boxes, which I did, and was a pain in
the A and pretty much defeated the purpose of shipping a bike in tact.
Also be aware that many Amtrack locations are limiting the Package Express service
which is the method used for shipping bikes whereby you are not a also a passenger.
Your home station, might, but the destination station might not or visa versa.
Best bet is calling ahead and finding out before you make the journey with your bike
and materials. Amtrack is the best for sure, if the ducks all line up.