Hello all new to the form, I have been casting pistol bullets, and reloading, for over 30 years, but now I am going to take the plunge into rifle casting, thanks to the Obama Administration and the lack of in stock bullets, My question is. I am looking at the Lyman 311291 mold for 30 30 –308 – 3006 . This is a 170 Gr, gas check mold. Will I need to slug all three barrels or should I go with the .309 seizer. thanks for any help in advance.