The only way I've annealed M1 Carbine brass is old fashion too, just setting the base of theu case in a pie pan of water and a propane. A very slow and tedious process.
I talked to the owner of the company, Jeff. He promised me a full refund including shipping if it doesn't anneal M1 Carbine brass as advertised. So I've ordered one. I asked him to hold shipping till next week to Phoenix when I return from my other home in Kona. If anyone is interested I will post a review.
I just got back in town and the Annealeez was waiting for me at the Post office. Unfortunately my Tempilaq had turned to thick mud. Thus I'm awaiting delivery of some Tempilaq thinner to get down to testing this machine on M1 Carbine brass. It is working great on the other bottleneck cases. for those I trust my mark one eyeball to judge the appropriate amount of annealing required. But the M1 Carbine case being as short as it is needs the Tempilaq 350 to assure the heat isn't travailing to far down.
Sorry It took so l o n g to report back. It seem old age bit me. I lost the use of my right eye to something called 3 optic nerve palsy, but enough about that. I was unable to set up the Annealeez (due to loss of depth perception). A very fine friend and fellow reloader came to my rescue. Using Tempilaq 750 on the mouth and 450 near the base has proven successful in annealing 600 hundred M1 Carbine cases. The cases he annealed were into their 4 or 5 reloading. There is a slight but noticeable feel in sizing and bullet seating between the un-annealed and the annealed. I'm hoping this will extend brass life and this info is helpful for anyone interested.
The neurologist has suggested I don't do any shooting for awhile as it may agitate the nerve. But just as the stupid thing didn't stop the brass from being annealed testing the renewed brass has been accomplished. My friend and my son enjoyed breezing thru 10 15 round mags. Happy to report not one split neck! :-)