I have watched the video and I’ll say this , anyone who has reloaded a lot of ammo has made mistakes along the way . Who hasn’t forgot to lock down their dies every now and again ? I certainly have . Now in regards to bumping back the shoulder 0.002 or doing it the way Eagle Eye illustrates both methods work just fine , handloaders have been doing it the way Eagle Eye does it for donkeys years before cartridge bump back gauges came along . Each to their own . One thinks this way is best , another thinks the other way is better . This we know Kenny at Eagle Eye Shooting builds some very accurate rifles , he has recently built two PRS rifles for Youtubers X-Ring and Isyour6covered , one in Hornady 6mm ARC and one in 6mm Creedmore that shoot .3 of an inch @ 100 yards . If anyone wants an accurate rifle built go to DP Gunworks ( Desert Precision Gunworks) you won’t be disappointed folks .