The only problem with this is when you take the powder out to start reloading your 1st charge vs the 200th charge will have different exposure times and your charges won't be consistent throughout the reloaded batch. I don't have a fancy room where I can regulate all of the conditions, but I have a humidity/temp meter and try to stay within a humidity & Temp bracket when reloading (also write down the conditions at reloading time) as well as leaving my powder in the hopper to acclimate to the conditions for some time before reloading so I don't have a powder that has variance within the batch. Yes this will have some variance from batch to batch but if I reload 200 and run 10 rnds over the chrony after every new reloaded batch I at least know the batch speed. When doing this test Also take randomly from the reloaded box so you can double check if there's variance between the 1st, 50th, 200th rnd in terms of speed. Just my process
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