I have found in the past that I can work with one powder and change the bullets and all the other little nuances and numbers and find satisfaction-of course if it was a good powder choice initially. I'm in the gathering stage of this build and it's time to get some stuff that goes boom. I've got a box of Lapua cases, 100 Amax/120 Nosler BallisticTips/123 Lap Scenar/130 Berger vld- So, if you had to at least start with just one powder/primer combo which? I just need a starting point and I've read so much it's still not that clear to me.
I'm new around here and after finding this site and learning the potential of my old dust collector 110, it's done nothing but cost me money :)
Thanks for any help!

PS: Packing peanuts, they will bust you just as fast as stripper glitter- ;D