send hornady 2 fired cases and $15 and they will make you a custom modified case that is fit exactly to your chamber. i just did this with a 6x47 lapua, worked perfectly.Thanks for that, that is a great video. Previously I've just used the hornady oal gauge, and it's always been accurate enough for what I've been doing... but lack of modified brass in 6.5x47 has me trying a new way... this is awesome. Can see the oal gauge being shelved for good.