I ended up buying an Impact M3 from a member. I love it. It came with quite a few different slugs. So I’ve been playing with different grain. Trying to tune it for 100 yards has been a trial and error but fun.
At the end of last summer I was working on a tune to have my rifle shoot heavy pellets and lighter slugs. Got to say that a whole lot of air and lead was pushed through that gun barrel before several seals and the regulator failed. I must admit the tuning process though tedious is very interesting: working to get all the parts and pieces working together just so. . . .