No, they're worse. And they have abysmal CS and do everything they can to avoid warranty work.
That said, the SDN6 is a good can. It performs well, especially with .300BLK. It's a tough can and can take abuse. But it has a super shitty mount, the Achille's heel.
BEST solution is to buy ten of the 51T brakes (the FH pings like a tuning fork and the Brakeout is just ho-hum). Then select the one that fits best and send the rest back. Do this for each rifle. Their tolerance and design is so sloppy that out of the ten mounts, you're bound to find one that locks up tight and one that wobbles like hell. You may get lucky and find more than one mount out of the ten. But ONLY settle for ones that lock up TIGHT and DO NOT move at ALL. I know AAC says the axial rotation isn't an issue but it is because it's not limited to axial rotation only and even if it was...
I used to modify the mounts by hand using a stone and reworking the bevel sloooowly and constantly rechecking the mating surface with ink. Boy what a waste of time but it does work if you know what you're doing and are really good with your hands. Just cough up the $1000 for ten mounts and pick one and send the rest back. Trust me, it's the best way. I have four of these damn cans in two calibers, two SDN6's and two 556SD's, and I tried a few solutions over the years, so BTDT.
In the future, Saker is a MUCH better hard use can and I just scored two for $499ea. on Capitol Armory. 5.56 models, but still. The Saker can do all the SDN6 can do and then some. Both are made tough, Saker is actually tougher. Saker CAN use almost any mount but their own mounts are hard to beat (and don't go PING! when you fire). Their ratchet mount engages teeth at three different points so you always get a solid lockup regardless and their Trifecta mount doesn't use ratchet teeth at all, at least not exposed, and they lock up solid too. When I say solid, I mean you can hold the rifle by the can and there is zero movement, it should feel like part of the barrel.
But For precision, I'd get TBAC hands down. If you have a KAC rifle with the proper mount already, then the new PRS QDC can or similar would probably be ideal. Elite Iron makes solid stuff too. Those are my go-to mfg.'s for precision cans but I prefer TBAC unless the can is gonna see a lot of abuse, like mag dumps and full auto fire, etc.
