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Discussion Starter · #1 ·
I have a 2 cavity 230gr 45LRN RCBS mold and it is casting in the 241gr range using No.2 alloy. My Lyman molds cast just slightly under advertised weight so I do not think it is an alloy issue. The mold is clean and closes completely so I am at a loss as to why this is happening.
 

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Discussion Starter · #6 ·
I wouldn't mind the weight so much if they grouped well but my new gold cup don't like them at all so far. The alloy is from a good reliable source. I size them .452 with Lyman super moly lube and set them on 3.5gr of Clays in mixed brass (mostly Winchester). I loaded some last night and bumped the charge to 4.0 of Clays to see if a little more speed is all they need.
 
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