Fairly certain I have some of this at home. Was going to look into converting to .257, but really have plenty of that already. Will let you know for sure when I get back there in a few hrs.
Just note these are stiff loads, and that Redhawk will handle them just fine. Someone else mentioned Buffalo Bore as they are the commercial choice for the most stout loads in this caliber.
That word in there about "concentric" is key. I had my guy permanently affix an adapter with a shoulder for my direct-thread cans on skinny barrel rifles.
The Hybrid is likely impossible to beat for the $$, but the TBAC cans are just fantastic! I know its "overkill", but I screwed my TBAC 338 Ultra onto my 300WM shortly after I got it, and I was simply blown away by how effectively it worked.
Just leave this up or post a WTT ad for the quantity that you have for what you want in place of it. Or maybe even offer it for relatively cheap price and use the funds for what you need/want.
IMO, I would argue that a good trigger makes a significant difference in ability to shoot a rifle accurately. Buffer system changes feel and can affect reliability, but has little to do with shootability...