Re: Seating Die inconsistency
Treating your rifle as a multi-component system and reducing variability in every component is the key to uniformity, and unifority is the key to the winners circle. It doesn't matter whether you're bowling, golfing or doing the grand.
Learning which variable is the most important and carries the most weight is difficult to find. Some of the information is a jealously guarded secret because it keeps you in the winners circle, but a lot of it is getting loose now because of the 'net.
You found one of the variables, don't let it go. Keep looking, measure everything you can get your hands on, question everyone and test it thouroughly. Search the net thoroughly, most of the secrets have been told, but remember, disinformation is part and parcel of this game and human nature.
I take great care loading for long range, less for close work. Every component is as close to the next as I can get it, within the boundries I set for that activity, i.e., to 300 yds, 300 to 500 yds, 500 to 1000yds and beyond.
To 300 is basically grab a box of bullets, a can of powder, some primers and a bag of brass and get to loading. I check a dozen or so brass out of a 100 to see the variability, Rem or Win brass, it doesn't seem to matter much. I shoot a few 5 shot groups with known good loads to see if they are still good loads for that rifle, load 2 or 3 hundred and go shooting. A squirrel doesn't know or care what the seating variability or ogive point was whatsoever.
Out past 300 to 5-600 yds I start getting more careful with all the system components and moreso with the ammo. The brass gets uniformed, separated closer by weight, necks turned, primer pockets and flash holes cleaned up, pretty much all the standard practices, bullets get a closer once over and the extremes tossed into the short range bin.
When I am going for over 500 yd specifically, I have a couple of full blown basically BR rifles and everything is designed for small targets at long range and I get real extreme with the ammo uniformity. 50 some years of knowledge, tools, a failed marriage and total and complete malevolence goes into each and every round because each is designed for only one thing and missing a target brings out the dark side and Mr. Vader...for a few seconds anyway, I have mellowed out quite a bit since the hair turned white.
Good rifles with good tubes can be a bit finicky sometimes, arguably. Maybe they need less variability to shoot to their potential.
Enjoy your toys.