I reload 6.5mm Creedmoor. I recently tested 3 different batches of reloads (all loaded in either July or August), and fired 7 from each batch. The standard deviation for velocity from all 21 cartridges was 12.4 Ft/sec, with an average of 2636 ft/sec.
Earlier in the year I tested factory match ammo from Hornady and Federal, and I got ~15 ft/sec as a standard deviation.
I don't have a feel for whether or not I should expect less velocity variation. Is this as good as it gets? Reloading for high accuracy is more complicated than I expected. There are a lot of small variables that seem like they may make a small difference, but when I am trying to make a 1.5 inch group at 300 yards, those small differences start to seem important... Note I said "trying to make a 1.5 inch group"... I have not quite done it yet... close, but no cigar...
I would be interested in hearing from anyone who gets less velocity variation than what I am getting.
Thanks...
Earlier in the year I tested factory match ammo from Hornady and Federal, and I got ~15 ft/sec as a standard deviation.
I don't have a feel for whether or not I should expect less velocity variation. Is this as good as it gets? Reloading for high accuracy is more complicated than I expected. There are a lot of small variables that seem like they may make a small difference, but when I am trying to make a 1.5 inch group at 300 yards, those small differences start to seem important... Note I said "trying to make a 1.5 inch group"... I have not quite done it yet... close, but no cigar...
I would be interested in hearing from anyone who gets less velocity variation than what I am getting.
Thanks...