That aint a good idea . To have good results with cast bullets in a revolver it's necessary that cylinder throats be larger than bore . You want the bore to be as slick as possible . Any tight spots in bore should be lapped out . If you firelap do not use jacketed bullets , use soft lead & just enough powder to have bullet clear the barrel no more . Clean & reslug bore often as you don't want to overdo it . Many Rugers have undersize cylinder throats that must be reamed or honed to correct size . This should be done prior to lapping bore . Often the bore will have tight spots that need to be lapped out usually where barrel is screwed into frame , sight dovetails , roll marks on barrel can all be potential tight spots . All that done , Size your bullets .002 larger than final bore dimension . Bullets should be able to be pushed through cylinder throats with light to moderate pressure . Alloy must be correct for pressure of the load . Bullets must fit the gun . A quality lube should be used . If leading occurs it's usually due to undersized bullets , too hard an alloy , undersize cylinder throats , rough bore & wrong lube . You get everything right you should have next to none . Once barrel is seasoned you can just run some patches down barrel & you're good to go .