Have the same gun (different stock) with a Leupold Ultimate Slam scope on it. Was getting terrible groups with pellets and then switched to BH209. It made an amazing difference. I thought it would not be as convenient but after shooting it for a bit, it became second nature to measure out the powder and load. I also found the trick with the drill bit in the breech plug. Groups shrunk from 2-3" at 100 yds. to 1/2" at 100. Also found a ballistics calculator for my smart phone. It is called Strelok Ballistic Calculator. You program loading data, ballistic co-efficient of the bullet, and some other data and it calculates your drop out as far as you want. It also will show your scope reticle and where it will impact in relation to your zero so you can see where the bullet will hit. Pretty neat stuff. The app is available free in the app store.