Ky,I first heard of their 395 magnums on the ASA cicuit and a friend picked up a sponsership with them.They are .395 in diameter and people liked the line cutting for 3d.At first their quality wasn't that great but they have some of the best flying arrows today.I liked the magnums so I decided to give the Stingers a try and man was I impressed and once I shot a deer with them I was hooked.They take a little tweaking in tuning but that just because they are different than what you are used to and I use paper only as a starting place.A little nock high and they are awesome.