I have limited experience with slugs. But the last couple og days I tried the grizzly. Set my impact to shoot them first up to 970 fps, and down. Used slug liner. The first test was not that succesful, but I did noticed the they seemed to like speed in the low 800s. So I did detune my gun to shoot with a max speed below 850. I started all from "min" on powerwheel an up. Not that I did expect them to group at the 600 range, but more like a learning experianse. Here are the first results at 25m. The circle on the target is one inch, Two five shot groups on each setting.
The gun is not zeroed, so that is why the groups are off target. At first not so good. But when i reach 830 fps, and experinsed a litle with valve adjuster, things improved
Ended up at around 810 fps, and zeroed my gun. Not a one hole group at 25m, but not that bad either, considering it was my first try with slugs. I have not tested them longrange yet, so have no clue on how they perform long distance yet.
Edit: Noticed I wrote the wrong speed at wheel setting 2, and 3, on the first target. The speed should be 678fps, and 720.
I had some occasional good groups, but they was not repeatable, so that is why I sticked with the setting on the last 6 groups, as there seemeded to be less flyers.