Thanks for those tips! much appreciated. I've seen the RL15 and 17 to be the most common w/mag 450s or br4. Seeing how my bullet weights are on the lighter side, does one or the other 15/17 favor those?
On the flash holes, I swear I have a couple that are off and I've only picked a couple off the top of the box. Have you found any off center?
I bought 3 dies, a FL, bushing shoulder bump and br seater, forsters. I'm waiting on comparator and bump gauge. Ordered a stock yesterday. I'm a couple weeks away yet.
I just picked up bags, caldwell f/r set and am planning on using a bipod/butt bag with ears. Cool to see someone shooting that setup so well.

I don't remember coming across anything about reaming the flash hole. In fact, I did see the opposite tip somewhere. Something along the lines of , "clean up flashing lightly but do not enlarge the hole". reminds me, I don't have any inside flash hole tools, just pocket tools. More packing peanuts

Thanks again!