The only way to respond to a question like this, is with evidence. The answer is ultra difficult to quantify, and takes more than a hundred thousand rounds fired and several hundred barrels at minimum to even begin to answer correctly.
My answer: A bad barrel is a bad barrel. A good barrel is a good barrel. Every rifling method can produce good barrels, and bad barrels. The competency and quality control of the manufacturer determines whether their method produces good results or not. Buttoned barrels will consistently shoot as good as any cut rifled barrels can.
Some proof, all with button barrels:
https://www.youtube.com/watch?v=u8e1UZ6w-lg
https://www.youtube.com/watch?v=O74bzzM1Htw
https://www.instagram.com/reel/CxaVgR3LQPa/?igshid=MjJkMmIyYzQxYw==
So in summation, button barrels from Benchmark barrels shoot quite small. Every one of them I've ever received from 22LR to .375 Cheytac. While I can't find the video's of back when I was doing cheytac stuff, you can at least see video evidence with your own eyes from 22LR to 7mm Norma Mag Improved.
Benchmark does cut rifled barrels now too. I have cut rifled barrels through here from many makers. These button cut barrels will shoot with
ANY cut rifled barrel. Rifling configurations of all across the spectrum. 2, 3, 4, 5, 6, and 8 groove, .17cal to .375cal, every twist imaginable, every flute configuration imaginable, countless different contours. They ALL shoot small. This isn't opinion. This is fact. So it's not about what... it's about who, and how.
Some companies can put out a good barrel 99.9% of the time, while others struggle with quality control. You buy your ticket and take your ride, and it is what it is. If you're happy, pound away. If you're not, spin up a new one and rock on.
This isn't complicated.
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