Finally took my Panzer out last week. No issues running about 40 mixed rounds thru it. Some observations:

1) Used I/C choke for all rounds. Most rounds seemed to shoot a bit left at 10 yards so not sure if it was the shooter . It has been a while since I shot an over/under.

2) Winchester #1 buck seemed to kick harder than the 1250 fps listed on the box and actually caused me to flinch. Didn't pattern well (wide spread) at 10 yards either so gave up after 5 rounds of that.

3) Federal mini #4 buck was super easy to shoot but also didn't pattern well at 10 yards. 1 box of 10 rounds was enough to see that.

4) Fiocchi Defense Dynamics 00 2 3/4 seemed to be the best. Manageable recoil and patterned well at 10 at 17 yards. Even though it's listed at 1250 fps, it was significantly easier to shoot than the Winchester #1 buck.