i have been using the lee 400 grn mold for casting these bullets,i was casting them very soft,weighing +- 412 grns.about 1/2 of them would size offset,sizing them .476 in my old lyman 450.i also was experiencing a good amount of fouling in the barrel,tauras raging bull.
sooo,i cast a new batch much harder weighing in at +- 395 grns,this reduced the diameter by about .002,making them .479 +- as cast, down from .481 but i still have the same sizing problem.the bullet has a wide flat meplat,i am using a large flat top punch wich works very well with other similar bullets.
do i need to replace the mold,i see rcbs has one now,or am i just doing something wrong.thanks,adker