I designed the .30 REECE and have been working with it since the early 1980's. It is a shortened .357 case with a .004" total taper.
I have load data using 19 powders with bullet weights of 100, 110, 130, 150, 165, 180, 200, and 220 gr. bullets. Barrel lengths of 10", 14", 15", 22" 23", and 24" were load tested. The Thompson Center Custom Shop, MGM, and OTT, LLC all will make barrels for it. Brass correctly head stamped .30 REECE and die sets are available from me, made by Hornady.
I am trying to get the silhouette shooters to try it. It will push a 150 gr. bullet out of a 15" barrel at 1936 fps. accurately. I do have a small data booklet I include with all die orders. Far from being complete, but maybe by summer this year I will have all my data in one place to print. I have a shilen select match grade barrel I started with and have been cutting off 1" at a time. In the end I will have data from 8" to 24". I cut and re-crown each time.
The cost of brass is $20. per hundred and die sets are $45. Shipping for both with tracking $9.50. If less I will refund. Personal check is fine. Send to : Carson Reece, 220 West Commercial, Lebanon, Mo, 65536. I usually ship out the next day if the post office is open. If you need any other info let me know. Will try to help.
Hope this info helps.
Carson Reece