Originally Posted by MontanaRifleman
I would suggest calling Dakota about the brass. What I posted is what they told me last year.
What adverse affects do you see in your Norma brass from pressure? I'm using it in my 300 WSM and it seems to be holding up OK so far with some slightly loose primer pockets.
Primer pockets stayed pretty good - the problem I see with it is case expansion. If I use a hotter load, I would get about 3 firings before I would have to decrease powder, otherwise I would get sticky to difficult bolt lift. I shoot a 330 necked to 7, initially was necking the 300 down to 7, but really didn't care for the Jamieson 300 brass, have not tried the new 300's, which Hornady now makes.
If I keep my velocities around 3350, using rl-22, and 140gr accubonds, I can get about 10 reloadings out of them, but if push them them over 3400, things get sticky very quickly after again, about 3 firings. To give you an idea - first few reloadings would be around 74 grains and no bolt release issues, but later on at 72 grains I would get a sticky bolt in similar conditions.
I FL resize after each firing using a custom match die set.
I have tried retumbo, H-1000, 7828, rl-25, but the rl-22 gives me the best velocity without pressures issues as long as I keep them around 3350 fps.
Perhaps the guys shooting a plain 7 Dak don't see the problems I see, but would be interested in knowing what velocities they are getting and case life.