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Using Barry's 9mm, 124gr hp, over 4gr of Hodgdon Universal with an O.A.L. Of 1.085. Seems to be working fine out of a blow back carbine, wondering what the pressure change might be like if fired under a locked bolt. (No velocitys recorded, sorry.)

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Velocity might be a bit higher from a locked breech, but other than that working pressures should be about the same.
 
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