I ask this question since I saw it suggested on another forum. Justification being that annealing is somewhat hit or miss at the manufacturer and that that can affect seating pressure. I have noticed that on my Lapua 6.5 CM virgin brass, that seating pressure can vary considerably ( by feel ). Gotten to the point where I can tell by the es numbers and the grouping which had the higher seating pressure. Lighter seating with lower es's giving me 0.5 or less moa.
I normally don't anneal virgin brass, but mandrel and set tension for about 0.002" Moly the insides of necks b4 and after mandrel, then prime, powder, and seat bullet.
I normally don't anneal virgin brass, but mandrel and set tension for about 0.002" Moly the insides of necks b4 and after mandrel, then prime, powder, and seat bullet.