Ronvella - I did just about the same with an original Steven's favourite, converted to centrefire, using a Hornet barrel, running flat nosed .225" bullets at 1,500fps with Herco powder. It was a lot of fun on gophers and killed much better than any load in a .22LR. It pretty much duplicated the old .22 WRF round that shot a 45gr. flat point at 1,500fps.