257 Bob AI load data (heavy)

sierracharlie338

Well-Known Member
Joined
Feb 18, 2013
Messages
168
Location
Texas
Curious is anyone has any load data for a 257 Roberts AI with the 131 Ace bullets. I am running a 7 twist and will be loading up some rounds Saturday night to test Sunday morning. Thanks in advance if you can lend any info.

SC
 

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