Go to the very top of the reloading forum, and click on the topic ..."New to reloading? Read this first". It will give you a good idea what is needed to get started. Cost?? It's all relative to how much you shoot, or want to shoot. The initial investment may not be worth it if you only shoot a box or so of ammo a year. But the really great part about reloading is that you can tailor-make ammunition for your own particular gun that most often will shoot much better than the factory stuff. That's when you really smile. That's when cost almost becomes a moot point.... You just can't buy ammo that shoots that good in your gun anywhere. It's called self-satisfaction......
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