I'm looking for opinions on brass quality of alpha , peterson and others that make 6br brass compared to lapua. I've used a bunch of lapua and if it was available i would use it. How does the other brass compare in keeping tight primer pockets and lasting in general. Is it as uniform as lapua in terms of neck turning and are the case capacities the same. I use 6br and expand up to 30 br also and would like to know if it is suitable for competition use. Let's hear your experiencies as I've never used any of them. Thanks