by No1Mk3 » 15 Feb 2018, 5:11 pm
G'day Scooter,
Significant is relative. To the hunter or casual target shooter the variation you will see is not much, but to the fullbore shooter working at or near maximums the difference could be disastrous. In general we tend to load start loading mil spec brass from 5 to 10% lower than commercial brass due to the pressure variations, and do not mix the rounds due to impact variations which in a major comp at long range could cost you a Super-V and lose the match. (I never have to worry about that, if I even GET a Super I'm happy!) Cheers.