Sig p228. It's a "compact" gun, but even considering the sight radius, I was shocked how badly I grouped with it. It felt comfortable. The SA trigger was great. I thought I was going to knock the bullseye out. I shoot my G26 better, and I'm pretty bad with that one, too.
I would have chalked it up to bad ammo, or something. But the RO asked me how I liked it. When I told him the truth, he was so shocked he handed me his carry gun... a P228 with aftermarket grips and stoked with hollowpoints. He insisted, so I gave it my best.
After firing the entire mag with carefully aimed shots, I was rewarded with the exact same group size. The RO gave me a nod and a grin, awaiting my shock and awe at the accuracy. I said something nice along with my thanks.
Earlier that same day I had been putting round on top of round with a P220.