Im definitely intersted in slugs along with pellets.
I have two Prophet Performance V1 LR - .22 and .25. These LR (long range) barrels in the V1 were slow twist rate barrels - optimized to win long range pellet bench rest competitions.
The .22 and .25 barrels in the PP V2 have a faster twist rate as SB327 said above. The PP V2 barrels in .22 and .25 should shoot slugs better than the v1 barrels- but they will not keep pellets stable (accurate) at the hi velocities that the V1 barrels can.
The PP V1s are very easy to tune down or up - you have an external regulator adjustment and externally accessible hammer spring adjustment.
The PP V2s utilize balanced valve technology. I don’t own a V2 but I understand that you use the regulator pressure to tune (control velocity) with the hammer spring adjustment not having as much of an effect with the balanced valve.
I would think that shooting MRDs at 950fps is going to need a significant moderator to make it reasonable in the backyard- as 51 foot pounds is moving a lot of air. The Huma Mod 40 that was suggested was a good idea.
However, the beauty of these rifles is that they are easy to adjust power - so there is no reason not to lower the power if just plinking or shooting targets in your yard.
Its also super easy to change calibers on the RTI Prophet. I timed myself and did it in under 4 minutes. So, you can pick up the .177 barrel kit for your PP .22 and make it real backyard friendly… and have plenty of power to try .177 slugs if you desire.
Thats some serious German glass that you are going to put on it. How short a distance is the minimum parallax on that scope?