The post by bodyarmorguy is spot on and has an excercise I hadn't hear of. I also agree very heartily with slopemo. Personally, unless you live in grizzly country and spend a lot of time outdoors, I've never seen a realistic reason for owning a 44 mag or 454 causal. ( Not addressing the collector or accumulator gene that many in the gun community have
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I don't carry (yet) and own a GP100 with a 4" barrel and an SP101 with a 2.25" barrel, each is a Home Defense gun and gets plenty of range time.