Here is some food for thought about using any kind of Pipe or even the round cardboard tubes for that matter....
The main reason these have more tendency to get dropped or damaged is that they roll..... These packages get moved in seriously high volumes using conveyor belts and machinery. Using these round pipes and tubes pretty much guarantee they are going to roll around unless you improvise.
The best thing you can do if you feel the need to use round shipping containers is to tape a couple light weight blocks of wood on the pipe so it wont roll around.
i think those triangular shaped USPS tubes are the best ones they provide. They don't get stuff stacked on top of them and always end up on top of the pile just like the round tubes do.... only they don't roll off the top.
i started building wood crates for my one piece bows out of cedar and paneling. they are light weight and pretty darn tough.
sorry to hear about the loss of the bow Rob. glad to see they came through with the ins. claim so quickly.