I got myself a new Lyman mould the other day and today I finally got to try it out. I spent a few hours and cast around 150 bullets of which about 6 were acceptable - and I'm not that picky. I made sure the alloy was hot, the mould was hot and degreased but I kept getting wrinkles. The other problem that I had was that one half of the mould would produce clean bands while the other would produce half-filled, frosted ones. I made sure to watch which half but both would do it alternatively. Do I just have to be patient and keep casting or is there something else I can do to speed up the break-in process. I'm fairly new to casting and all previous experience has been with aluminum moulds. Any advice would be appreciated. Thanks.