I think if you call Ruger and return the gun with your target that they can help correct it. Working with a local gunsmith can also work out, but will take time to dial it in perfectly. He will likely reclock the barrel, then address barrel-to-cylinder gap (if necessary) afterwards. I used a rubber hammer and hockey puck and covered it with heavy card stock. I'd lay the side of the front blade against the hockey puck, cover the barrel, then strike the barrel with the hammer. Since I'm afraid to do this at my local NRA range (figuring I'd upset others around), it takes me at least a half-dozen trips to sneak up on the slow progress. Eventually it gets close enough for me. I don't shoot my short-barrel Vaqueros at long distances (usually just thirty or for feet), so I have reasonable expectations. As mentioned, first make sure your grip thickness fits your hand and that your trigger finger is pulling straight back on the trigger when the hammer falls. Getting this geometry right is critical. Otherwise, you might find that changing point of impact is just as easy as getting custom (or different) grips. Many years ago when I was new to Vaqueros, I was shooting to the left. I let another guy shoot it at the same time and he was dead-on center. It made me spend more time making sure my gun fit me first before changing anything. Now I've had many Vaqueros and they all wear the same thickness of grips that fit my hand and promote good geometry. Sone need no front sight adjustment, sone need a little, and some need a lot. When you get a Vaquero set you so your POI with its most accurate load is dead-on, then you'll never sell it. It's good to have a couple or a few like this, then just buy Blackhawks with adjustable sights from then on to save time.