If you are wanting .375 Win Brass I would suggest to go on the Cast Boolit.com forum and place a WTB add. . .you WILL get a response!!! As for myself, I went with the 30/30 Win brass route and to as far as having JGS cut the reamer for me. Actual .375 Winchester brass is becoming a unicorn these days. Working 30/30 brass is the ticket!!! I have found Starline 30/30 brass to be stout enough to handle .375 Win pressures with 230 gr. cast bullets and having to deal with 3/16th +/- shorter case worth the added BS. Newer brass and what is called "Basic" brass has a stronger web section verses the day of O'le brass. I called my reamer print the .375 Shorty. This was for my T/C Encore handgun barrel. I'm also considering a Rossie R95 being sent of to Jess for a rebore to the .375 Shorty as well. I'll keep you all posted if that comes to fruition.