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Those peach shoots should make great arrows. Try peeling a few now and see if the split when drying. Leave the bark on the others. Seal all the ends with something waterproof like melted wax, titebond glue, varnish, or whatever. Go 1" to 2" up onto the shaft from the ends.
If the peeled ones split, you know that you have to leave the bark on when drying. You can bundle them tightly when drying but they will shrink a little and the bundles will have to re-tied during drying unless you use something elastic. You can also leave them untied but they will be harder to straighten later. To know if they are dry, weigh them periodically and when they have stopped losing weight, they are dry enough to work. They will dry a little more after the bark has been peeled off, so wait a couple weeks before you spine test them.