Considering a couple of new builds .458 & Grendel 6.5

[damon1272]

As the title says I am consider building these two uppers. On the grendel I think I will go with a 20". I am wondering how well the Alexander Arms barrels are versus the .264 LBC (I think the LBC has a tighter neck but I am not sure). Any input from Grendel owners on thier personal set ups?

The 458 is something I am interested in. The one thing that concerns me is the cost of ammo but I will reload so that will help some. Any input on how this round performs in the field. I am looking at the Wilson combat lightwieght set up for this as I have an upper ready to go.
Thanks for the input.

[patrickstarfish]

Don't do 458 unless you have already stocked up on 300gr JHPs from Remington. They have been out for a long while now, going on a year. I have resorted to more expensive Hornady JHPs.