For me, it’s how one defines performance. I will buy any next model if the design changes allow it to do two things better, 1. It will be more consistent 2. It will be more accurate. More power is not on the list unless it adds to being more accurate.
Shooting slugs exclusively through my two .22 Impacts MK2 PP, I have consistently seen that speeds in the early 900s are the most accurate. What has been the only issue with both guns was the fact that the accurate tunes would not hold, a problem that all 9 slug shooting MK2 PP Impacts have in my group of friends.
Carbon sleeves helped find the accurate tunes faster when the guns came out of tune. All of them have very consistent and very reliable Huma regs in them where we are getting extreme spreads as low as 5fps. Not one reg has played up. Some of us shoot close to a thousand slugs per month.
We finally solved for the inconsistent tunes and added to the already splendid accuracy capabilities by having a master engineer and world champion benchrest shooter customize our Impacts. The performance improvement has been way beyond our expectations. The answers to improving consistency and achieving even more accuracy was mostly in the barrel system.
If I was in the market for a slug shooting air rifle or had a pre PP Impact, no doubt I would buy the M3. And the gun looks very nice. The MK2 PP is one of FXs best air rifles ever produced, in my opinion.