Guys running stiff loads of cfe223 in a 6arc pushing 6br velocity are likely running 65-70k psi, barrel life will be no better than a 6br. The 6arc is 34.5gr capacity, the 6gt is 44gr. Cfe 223 might work in a 6gt with 60-80gr bullets. But for heavies, you need slower powders. If you must run ball powder, try stabal match.
I'm interested in the option to progressive load. I'm not overly concerned with barrel life.
What bullet weight are you using? 2958 is moving along for a gt if those are 105-109gr.
A little zesty, true. I have a second test batch but haven't had time to shoot it yet. I was using Berger 109gr LHRT. Alpha Brass, 450 CCIs.
Next best powder is likely Stabal 65, 37-38gr. I don't have cfe223 to try, nor have I saw it in any load data.
Oh I tried Stabal 6.5 first
. That was 21 SD 49 ES. 
Thats what I’m shooting. Only taken it to 600 yds, but it’s a tack driver.
Does N160 carbon foul heavily like N150? N150 shoots great in my 6br but F me is cleaning a chore, reminds me of rl16.
All the VV powders are a bit dirty, some more than others. N160 is dirty but not terrible. We clean every few hundred rounds too, 150 to 300. The GT seems to be susceptible to carbon rings and we do not want to deal with that so we clean more frequently.
I have no experience with n160. I use n165 in my 7Saum and stocked up on n150 for my br when the varget is gone.
www.whiddengunworks.com
Whats your load data with N160? Bullet, charge, mv? Curios what bullets it'd be best for. I have a very large supply of H4350, but always open to alternatives, as I see it's 25% less per #.
Don't, it is terrible stuff - I will buy it all and save you from the horrid results
N160 works with heavies. My QL profile with 115 dtacs has max at around 38.5 and 37 is 2845 and 99.9% burn. I don't think it would work well with 105s but I have never tried. N150 and RL15.5 are my other go to powders for the gt. I tried N555 too, and it works but it is a full compressed load. I plan to run N160 on this new barrel with dtacs.
