I would agree with option 1. When I decided to rebarrel my 7mm Weatherby, I ended up having a 3 contour 9 twist Bartlein put on it and I have no regrets for a sporter hunting rifle. At the time I was pricing, Weatherby was a little more expensive than ordering a Bartlein and having the local...
I think the main issue was the 10 twist, but if you’re going to build one then it’s probably irrelevant. I rebarreled mine as a 9 twist and it shoots really well with 150-175gr that I’ve tested. Brass is relatively expensive, especially now when you can find it. Peterson has started making...
I’ve only been able to find it at local gun shops occasionally, but sometimes pretty expensive. I switched to Ramshot Magnum because it was easier to find for me and it has shot better in some rifles.
I had the same issue with my 7mm Weatherby. It would only shoot decent with 120-140gr bullets. Since going with a 1:9 twist, it shoots heavier bullets great and has become my favorite all around hunting rifle.