I want to get a barrel on order for an 1885 low wall. I'd like a finished length of 27" in a 22 hornet. Probably in a no. 1 profile but mabey a no. 2.    1/2  octogon 1/2 round.  Are you ordering a palma sized no taper blank then having a smith mill them down? Or are you ordering a tapered barrel then cut the octogons and re taper the round part. Or are you ordering an octogon barrel and just taper the barrel? Ive only found a couple of barrel makers that offer custom profiling. Im assuming it's a toss up between button and cut rifle barrels when using small diameter jacketed bullets.

And they do Douglas barrels with a much faster turnaround.  Ledball

GM offers full-octagon and they are easily turned to half-round.
DZ Arms in OKC also carries barrel blanks and has a fast turn-around for rebarreling. He did my Low Wall in about 8-weeks from start to finish.