Second batch of 130 grain rounds finished. 400 more to go. Hopefully I’ll get some time this week to get to the range and fire them off. Then the real reloading can start.
This is true but there is no reason not to develop a viable, high-performance load with new brass. IMO, you are just wasting time and resources if you don't. Then when all your brass is once fired, adjust your load for the resized brass (with 0.003-0.004" shoulder set-back - not back to SAAMI). My updated recipe in fired, resized brass can be as much 0.3 to 0.5 grains more. This typically brings the velocity back up to the load you developed in new brass.Maybe “fire forming” wasn’t the best choice. But after reading several sites it recommends to fire once then proceed to reload as normal. It is supposed to increase the internal capacity of the brass.
That is how far back you setup your resizing die to move the shoulder. This gives you the maximum case capacity and lowest chamber pressure while maintaining reliable feeding in an AR. Set it back anymore or back to SAAMI as the die instructions likely detail and you defeat the benefits of fire-forming to your chamber.What is “shoulder set back”?