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Lincoln Jeffreis, JNR., 120 Steel House Lane. Birmingham
Jeffrie’s Long Range High Velocity for 3 “Brass case 12 bore 3 inch # 3770
Barrel 32”, weight 9 lbs. nitro proof for 1 & ¾ oz
Bore 0.751” right choke .012 and left choke .038
What would be the service pressure?
What BAR Presuure is this Proofed?
Threaded Mode