In the STW, the 200 gr ULD will be marginal in a 1-9. I would recommend a 1-8 or 1-8.5 with this class of chambering.
In the 7mm RUM, in most cases the 200 gr will stabilize in a true 1-9 barrel but still I would prefer a 1-8.5 class barrel.
In my 7mm AM I have yet to see a 1-9 not stabilize these bullets at its higher velocity range but I am still leaning toward a 1-8.7 twist in barrels under 28".
As far as GreyGhosts bullets and the discussion that BB and LV are having. BB, I have read everything LV has posted about these new bullets but from my past dealings I wanted to talk to the maker directly. I did and asked him for his details on his bullets. Basically he gave very little information and instructed best thing to do would be to order some bullets and see what performance I got with them. I did order 100 of the 220 gr 30 cals to test in my 300 AX and will make a full report on them when they get here.
I suspect they will perform very well.
Interestingly though, GreyGhost told me exactly the same thing that Richard would tell customers, try them for yourself and see what results you get.
I will admit that Richard can be hard to get ahold of but that is just because he is not a full time bullet maker.
Simply put, I would have to agree with LV, do not believe what others say about bullets, get them and test them for yourselves, that includes the reports he has posted. I would not take them for gospel, just as he has recommended everyone does with the Wildcat bullets.
My only concern with GreyGhosts bullets is simply cost. They are spendy but all bullets are getting spendy.
Will I stop using Wildcat bullets because of GreyGhosts bullets, certainly not but another quality bullet option for my customers is never a bad thing but I will fully test them before recommending them to my customers.
If my customers do not believe me about any bullet performance, I really do not believe they should be intrusting in me a rifle build project.
Personally, there are a host of people on LRH that I would read a bullet test result and fully believe, in fact, I see no reason why I would question most test results from those on LRH. I think we can trust each other on here but again, its always best to do your own testing if you want to find out exactly how a new product performs.
No need to get fired up on either side, just another bullet option, how is that a bad thing. But a new bullet coming out should never be a reason to attach another bullet maker who also makes a fine product. This I do not understand.......
I will post some results when I get the bullets heading my way. I assure you I will be just as fair and truthful as I was testing any of the Wildcat bullets. It serves no one any good to not post truthful test results.