I finally had time to really check out Gene's tune on my old Gamo Hunter 220. Wow - what a difference! I had Gene do his super tune instead of his turbo tune since I 'm more of a "plinker" than anything else. It's hard to believe it's the same rifle. It's much quieter, smoother to cock, and shooting around 950 fps with 7.5 grain pellets on Gene's chrony.
The really big surprise was the improved accuracy! I had already noticed better accuracy before Gene's tune when I installed Bob's [aka Charlie da Tuna] GRT-III trigger. However, Gene's tune really improved my old Gamo's groups. I tried several pellets and attached are some of my better 10 meter groups. Not too bad for an "old guy" shooting from a rickety patio table. I believe I could shoot "one hole" groups from a real bench rest.
Keep up the great work Gene! Great job!