I haven't personally but it is a proven cartridge and is likely the biggest 30 cal you could feed from the mag in a srs. I have a 300NM that I am about to start playing with, but its a 18" barrel.
I just put my NF NX8 4-32x50 F2 and NF unimount on the scale and they came in at 2lb 3.9oz so add that to the rifle all set up and your at
10lb 14oz on the button.
This is my A2, scale reads 8lb 10.1oz. Its a 18" 300NM proof barrel with a flutted shank and a CA titanium brake and a 9 slot aluminum rail on the handgard. I don't see how you can get any lighter than this unless you remove the monopod. Hard to add less than 2lb to that number for an optic and...
It depends on your elevation and temp. Also just because there not tumbling doesn't mean your BC isn't being degraded. What I was getting at is if you are leaning towards heavy bullets and your getting a new barrel why not go 1 in 8 there is no down side to a little extra twist.
If you are in the heavy end of that range would use N570. N565 would be better in the lower end of those bullet weights or even lighter. N570 is an excellent powder that is pretty temp stable and gives max velocity but you will pay with barrel life.
Its a little hard to read the scale but the 300NM conversion is 8lb 10.1oz
The 223 conversion is 9lb 4.5oz
That with a 9 slot aluminum rail and monopod, magazines to obviously.
The 223 barrel is a bartlien 18" 6.5 twist, sac ultralight contour and it weights 3lb 11.3oz.
6.5oz heavier than than the carbon barrel with the break. If you take off the break the carbon barrel is a half a pound lighter.
I finally received my A2 covert and conversions from SAC. Everything looks amazing. Now just waiting on my nx8 4-32. Once hunting season is over I will get a chance to play with the new toys.