I asked about going from new to once fired brass...this is a new gun for me and I have only been reloading for a year. I have shot maybe 300 rounds of new brass and just cleaned and sized the first batch of once fired. Results are below. Gun - 30-06 by Darrell Holland...Borden action, Hart 24" 10 twist, Jewell, McMillan. Load - 57.2gr of H4350, Rem primers, Nosler brass, Nosler BT 180gr Dies - whidden custom based on fired cases I shot 5 of new and 5 of once fired through a Magneto. I then fired 5 of each without a Magneto to get a new zero. I was at the 100 yd range today. New brass - avg velocity 2824, ES of 18 and SD of 6. Didn't measure group but it was so-so. Resized brass - avg velocity of 2844, ES of 15, SD of 6. Group was better...pic attached. I didn't know what to expect but I was pleased with how it worked out. Next up is to take out to longer range and validate drops. POI shifted but moved it down .75 and left .5 and was dead on.