Re: 7mm or .300 WSM in AR10/SR25 platform?
I have what I feel to be the more common and better suited, 300 SAUM AR10 and I love the beast. It's a factory rifle, that's been upgraded to suit but I do intend on building a 7mm SAUM upper for it in the very near future.
Right now I'm shooting 190 VLDs at a drop confirmed 2915 fps, but I've ran 210s at almost that same speed before experienceing pressure sighs.
In my experience, and adjustable gas block is a must...and that MAY have been the reason why you don't see many of these around.
I know sales by DPMS and Armalite were pretty slow, and that's why it was dropped...but the ability to better tune the gas system is a big advantage in my opinion.
Right now, from my research, you're limited to one supplier and thats Accuracy Systems. Trying to get your hands on a bolt is where all the problems lie, especially if you want to build one yourself.
I haven't found anyone else besides Accuracy Systems that's still building them...but I have seen that POF had one at SHOT a few years back that apparently never made it to market...and another builder was suppose to have one released last year, but I guess that hasn't made it either.
Here's mine.