If you look it up you will find the answers for yourself and know that several powders will get 3000 fps in 308 with 150 & 155 gr bullets...including an old manual that gets there with Varget, at least their lot of powder and test barrel. And you would not take my word for it anyway, and sharing information is mostly a waste of time on these sites...opinions seem to outweigh facts.
My total cost for the upper was $1150. Shop the sales, like labor day, free shipping, close outs, I saw deals and heavy discounts while browsing through adds for several months. Even made a phone call to get an additional $50 discount, cause the add said call for details. This setup is functioning 100% with no issues of the small frame Ruger, or tearing up brass, and is getting half moa to one moa 5 shot groups with 3 zippy loads... and working on more. It feels like carrying an AR 15...plus there is a host of parts for the AR 10 platform to build it your way...light or extra sauce like a berger,.. if you choose to do so.
Since you were interested in it enough to look it up...here is the exact chronograph reading just like I said, 155 Lapua 2900 average fps. And I checked primer pockets on the LC brass...still good. But this was not one of the accurate loads, just a max load to see what it would do...the 168 gr Berger, the 150 gr Gold Dot, and the 208 ELDM 2442 fps were .5 to 1 moa for 5 shots at 100 yds, with max powder charges. Have some new 177 SMK and 169 SMK to try, with some different powders...I've used in bolt guns and other AR 10s.
