ok so im very new to long distance shooting ive always done 200 yard max shots at the range and whitetail hunting in the closed in bushes of florida and georgia. i currently have a remington model 700 sps sporter short action chambered in .308. the objective is to use my action, bolt and trigger assembly and put them all in a B&C medalist tactical. i have decided i want to work up to 1000 yard shooting. i know the ballistics of a .308 arent up for it so ive been researching and want to change over to a .243. my question to all those that are way more knowledgeable than me is, is it possible with just switching the barrel and stock?