Wow! That’s some crazy variance. Ive never seen that big of a difference before. I’m wondering if you are getting some stretch when you are pulling the brass over the expander. Have you tried sizing any without the decapping pin in. I’d be curious to see what the variance is when done that way.
JTD
I did just that. I've got the die set so I'm basically neck sizing now and not touching the shoulder with the expander but no decapping pin. I've got 10 rounds loaded with 11.4gr of A1680 and 20gr V-Max that I'll test fire this evening. We will see how it works. I've got just one manual with any load data for the cartridge but checked on line, while this load is a max in the Lyman book if appears to be a starting load compared to what I found online.HORNET.jpg
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