Fast barrel/Slow barrel

[William T. Watts]

This is the second Ruger I've purchased in the last year,the first rifle has produced very good accuracy with high velocity with both 150 & 165 grn Nosler Solid Base bullet & IMR4064 powder. The rifles Ruger are currently producing have barrels that are being manufactured (hammer forged) by Ruger. To answer MEHavey I used a Scott A. Duff muzzle wear gage to measure land to land diameter which was dead on .300". I've mainly used my chrony on factory produced ammo to establish a baseline and see if I could duplicate or exceed factory velocities. When I ran into pressure problems with flattened primers on starting/min powder charges I felt it was time to back off and approach from another direction. This is probably a good time to remind folks that reloading manuals caution everyone to start with a minimum charge and work up if pressure indicators permit. Mine obviously didn't, I need to find out why!! I do intend to pull some of the factory bullets and use them in my cases, with my powder charge, my primers and the same over all length as the factory loaded rounds and chronygraph them!! I do need to pick up some 150 grn Remington Corlokts & Speer Hot Core bullets and see if they flatten primers with starting loads too. My wife's going on a business trip in a few days, this should keep me busy and out of trouble while she's gone!! Thanks for your responses!! William