If your not familiar with the 45R, it's a rimless 460 S&W created for the AR10 platform. Satern sells barrels for both platforms and they are very accurate barrels. 3gr diff in case capacity over the 450B so not much to be had, I just like matching bolt guns to my AR's.
![Surprised :o](./images/smilies/icon_e_surprised.gif)
![Image](https://s20.postimg.org/oukax5765/10pt.jpg)
![Image](https://s20.postimg.org/s1eugsu71/200gr_barnes.jpg)
![Image](https://s20.postimg.org/gcausuay5/200gr_barnes1.jpg)