Re: Carbide reamers
I think you kinda goofed.
Carbide is beautiful when used as intended - for high speed production type machining.
For onesies and twosies work particularly at low spindle speeds, HSS produces better surface finish, and is more forgiving.
Carbide is a lot more money for no reason, to someone only cutting a few chambers.
Were it me, I'd pay the $15 order change fee and go HSS.