I was looking for an action to build myself a .17 HMR on but just purchased the Annie 1517. It has a 25.5 heavy stainless barrel. I was reading on the Bullberry site they discovered the 19 inch barrel had the highest velocity. They determined this by cutting the barrel an inch at a time all the way down to 10 inches. I was thinking of shortening my barrel to make it more handy. Anyone have any thoughts or experiance with the Hummer and optimum length or dealing with the model 1517?