(Buffalo River) Hunting and fishing used to. In 5 round blister packs so very handy. Haven't seen it lately but they do have some ADI loaded 55gr SP which are comparable but not "ballistic tip" or whatever.
68-69gr will stabilise in most barrels, they seem to be the "sweet spot" for .223. 1:8 is fast, AR fast, you could easily go 74gr or higher.
I would do ALL testing without a supressor. As mentioned above, yaw and instability leading to baffle strike.
90gr in a 1:12.5
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