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Old March 19, 2005, 06:50 PM   #1
randyhill
Junior Member
 
Join Date: March 19, 2005
Posts: 2
Loading 44 mag for 1440fps

I am setting up a test bed using a Thompson Contender frame. I need to fire 230 grains at 1440fps with the min. variation in speed. I will be buying a new custom barrel. Is there a way to determine the best length?
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