I would be looking at light explody bullets that will still expand and fragment at reduced velocity like 125 NBT and speer 130hp and possibly the 90grxtp pistol bullet if really on a reduced recoil rampage, the 90gr xtp run subsonic with a full length barrel and suppressor makes you wonder if it actually went off. terminal effect is not great tho like any subsonic but a full case of trailboss would probably yeild around 2000fps at a guess (I was running 5.6gr subsonic) and if it still shot well and I see no reason it shouldn't could be an effective round to say 150y and very little recoil.
I would be looking at the first two tho for your application if a 223 wasnt doing the job.
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