I've been shooting a 270 and a 243 for years and I like both calibers. My selection of guns is limited. Ruger Mark 2 in 270, Ruger old style tang saftey 243 heavy barrell which I bedded the action and floated the barrell w/ harris bipod,and a 243 remington Sportsman 78.All have leopold scopes.I would like to shoot longer ranges more accurately and after spending considerable time reading on this board and others have found that no one really recomends a 270 other than an Allen mag, and there is nothing much said at all about the 243.I'm considering tradeing of the 270 for a rem sendero 308 for a beginner long range gun but am up in the air on the rem 243.Would like a lighter gun for closer work (600 yds coyote), (300 yds mule deer) Plan to re-barrel the rem 788 for better accuracy. Like the 243,heard a lot about the 6.5-284, even considered the 308 for versitility.Any recomendations or advice would be greatly appreciated.Love the site, wife hates it cause she has to drag me away from the computer every night. I'm just getting started w/ reloading if that helps w/ the answers