O M G!
There will be blood!
How's the mechanical offset & what's it doing with POA/POI at ranges between 15m-50m with your RDS mount?
I have a Buckmark with TACSOL Barrel & OutbackII combo that has a black black soul.
I've used a shit ton of loads through it & have settled on Remington Subs. The action is good for a brick before it needs torn down & sprayed out. I've grown tired of re-zeroing it after each tear down but it's the only way to keep it feeding reliably.
I wasn't happy with the performance of round nose subs on critters. Wolf Target was a little better in my limited experience but I settled on the increased noticeable damage from the hollow point of the Remington.
That gun alone has been a wonderful pistol marksmanship trainer.
Since you're Q & have a supply of material & machines I'd love to see your creations. I took an UncleMikes Medium frame auto nylon belt holster & cut the muzzle seam to allow the can to pass through. I hardly ever go anywhere out of the metro without it.
bushy tailed rats
and. . . well, maybe other nuisance feathery critters.
Wait until you set up a bolt gun. I've got a feeling your going to go strait evil.