I've been watching this for a long time. Sure wish I would have got in on the barrel order.
The only negative I see is magazine capacity.
Agreed. I have rifles built in cals 22 Hellcat, 257 Bobcat, and 270AR - all based on 6.5x47 (308 size head).
The best magazine for feeding/capacity is the PRI 6.8 mag, and max capacity is really 7 rounds.
Perfect for Deer & Yotes, for hogs 7 rounds doesn't cut it.
That is the downside to the 30 Sabercat - 7 rounds capacity.
Look at the 6.8 based 30 Herrett AR again - 30 round mag for my LWRC lower.
My Herrett is running 100+ fps greater velocity with 125 grn bullets than 6.8 running 120's, so more energy on target.
That speed is using Shooters World Blackout powder,, most folks are loading AA1680 powder for about 40-50 fps more than SWB -
but 1680 fouls a lot more..
So far - the hogs hate the Herrett.
************** will have a run of 18" Herrett AR barrels fall 2017. I plan to upgrade my 16" Herrett to gain another 45-50 fps speed...