Best, with the definition of the word in comparison to the context in which you use it does not exist. If it did, there would be one barrel manufacturer left out there.
From my point of view, each has their own spin on what is "best" or better or cooler or more cutting edge. That is for the end user to decide; a pure Ford vs Chevy pie fight.
There have been at least two new manufacturers coming to the table this year that are making waves & getting solid reviews. Mullerworks is one of them, the name of the other escapes me. This also leads me to believe that there is no best, just good.
I'm not typing all of this to jab you in the ribs or make light of your question, only to show you that a myriad of manufacturers exist that produce high quality products that will suit your purposes. Don't get caught up in a preference debate.
Heck, I'm the only one on this forum that I know running Obermeyer barrels (maybe the others are just quieter than I am
). Does that mean they suck? No, again, just my preference based on my working knowledge of them.
Check out the stocking dealers for what you want. Find the Material, twist & contour of what you're looking for & order it. Running all of them side by side chambered in the 257Roy will, in my wildest of SWAGs probably only yield a throat life spread of a couple hundred rounds from best to worst. Again that is a SWAG but not entirely without merit.
If I was dead set on maximum throat life & that alone, I'd probably order a polygonal Schneider; have it melonited & see what happens.
Excuse the long post & please take it with a grain of salt; for some reason I felt like rambling today
Here are a few suppliers I am familiar with: at least my post was somewhat useful!
BARRELS
Grizzly.com® -- Product Categories
Custom Rifle Parts
t