Hey All... this arrived yesterday..followed the breakin recommended by the maker... and it just works splendidly...4 cavity Aluminum...
220gr. in Lyman #2 Alloy....diam is .433" ... true KEITH bullet...equal length driving bands and square corner grease grooves....
a bit lighter and hopefully less recoil and a little more speed...hopefully easier on your vintage M29 from the 50's & 60s...
we shall see....
Pete..in central texas