Excellent to know about the 4227.
The main reason I quit using special brass was because of that build up. Hated it. My son and I went to the range today. When he shot the 357 with my 158 cast with red dot load, he smiled and said “that’s kicks like a 22”. I load my 44 the same way, but with unique. I also like keeping up with one kind of brass.
JTD