I have been wanting to put together a 6.5 Grendel AR-15 for some time, and am hoping somebody out there can help answer some questions I have before I finally bite the bullet on it. I'd also like to try and keep whatever parts I do buy fairly local, just to help out the PNW area's manufacturers. The longest distance I get to target shoot with my rifles is 300 yards, but am hoping to start pushing that out, hopefully to a thousand yards with this particular build. I am not looking for a bench rest rifle, but more of a DMR set-up that I could take deer-sized game with, something that can be carried around in the hills quite a bit and not weigh a ton. Are there any true 6.5 grendel barrel manufacturers in the area? I'm familiar with with Blackhole Weaponry, but my understanding is that the chamber that they use isn't a true 'Grendel' chamber in their barrels. I've scoured the internet as much as I care to, and haven't found a satisfying answer to why or what difference it makes. Any first hand experience would be greatly appreciated. My other option that I'm looking at is Shilen Rifles' 6.5 offerings, probably the 18 inch midlength barrel. Shilen's website says that it is a "tactical" contour, but I frankly have no idea what that would be in comparison to standard AR contours. Hoping somebody can break that down for a dumbie, would this be comparable to a pencil, government, or other contour? They also have a 20 inch rifle barrel, which I'm reasonably sure would compare to a HBAR contour. Am I really going to lose much accuracy/velocity going with the, what I assume, lighter contour/shorter barrel? From what I have read Shilen make fantastic barrels, probably better than my shooting ability could live up to, but would greatly like some input. I've already settled on a Seekins Precision SP223 lower with a Geissele SSA-E trigger, but is there any reason this lower wouldn't work with the 6.5 Grendel's magazines? Supposedly the Grendel's magazines will fit in any mil-spec'ed lower, but would rather have confirmation on that. I have also been trying to decide between an Aero Precision COP or a Seekins Precision upper, possibly with a Geissele Super Modular Rail if I can't find something else locally. Any pros or cons with either upper receiver, and is there another rail or receiver that would be from the Northwest? Lastly, for those reloaders out there, is there a particular grain weight the Grendel likes? Any powders that work better than others? Is there a certain brand of small rifle primer that works well? The Grendel is still a newish cartridge, and I'm limited to what I've managed to snag online, since my Speer manual doesn't have load data for it. I'd be immensely grateful for any help you guys can provide and thanks in advance.