Ok guys, i have a new lee 6 cav 452-228 mold that I'm starting with. my first batch had a lot of wrinkles and were hard as a brick. i added some soww to soften it up and really got the mold hot before i started. now I'm getting well filled out but frosty boolits. i notice that a seam appears on many of them. really can't feel it but can see it. is this bad? I'm casting between 675 and 700 degrees. thx all