I've not tried any of the heavier bullet (45 grain) sub-sonic ammo so no opinion. It's supposed to function semi-auto firearms 'better' than common sub-sonic-at least that's the claim.
The preferred ammo for my 22/45 host is CCI sub-sonic 40 grain HP while the RAR likes Aguila brand of same type. RWS sub-sonic HP works well in all but the greasy bullet lube precludes field use
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While some folks seem OK with using SV ammo, I find there's just enough rounds that exceed the threshold and create a bullet signature to take this ammo off my list. When your needs demand ZERO signature but your ammo gives 10% downrange 'pop', it's a no go.
It's sort of a PITA but each firearm and application has it's preferred ammo. 22/45 = CCI sub HP, RAR rifle = Aguila sub-HP, workshop 9" AR pistol = RWS sub-HP