The biggest complaint we've heard about with the PSA stuff is crappy barrels and less than acceptable accuracy. That comment extends past the AR-10 platform offerings into their AR-15 stuff as well.
I own three AR-10's, the first was an Alexandria Arms. It's a bit heavy but shoots well and no function issues to date. I built the PSA AR-10 shortly after to come up with a lighter rifle for hunting out West. I also traded for a DPMS new in the box.
I've spent enough time on the range with all three guns to conclude that none of them are capable of one hole at 100 yard accuracy, but all three have more than acceptable accuracy for hunting. I've shot some commercial ammo thru them, Fusion, Super X, Remington (all 150 grain loads) and PMC. For hand loads I've tried 4320 (had three vintage cans laying around) pushing plain old Sierra 150 grain soft points, and a box of Hornady 155's, then the Barnes 175's backed by Varget.
The heavier I went with bullet weight the tighter the groups were (in all three guns), although there may have been some "break-in" going on.
Last year right before heading to Colorado for the Fall hunt I spent one final day on the range. It's on our farm and we can take shots up to 500 yards but rarely shoot more than 300.
I was on the lane leading back to the field and a ground hog popped up in the bean stubble. It was pretty warm for mid-October which was a good day for shooting but a bad day for the ground hog. I took him out at just a tad over 200 yards with one of the Barnes 175 grain loads. I guess if I'm well on a ground hog at 200 yards an Elk woln't be much of a problem at 300 yards.
Anyhow, PSA gets a bad rap in some circles. Not sure how much is from direct testing, rumor control or just regurgitating old information on the NET like we see with just about every single topic one could "google" up.
My direct testing tells me that my PSA 14.7" AR-10 is a good piece and accurate enough to take any North American game animal to at least 300 yards. The same day I shot the ground hog I backed up to 300 yards and a shot a magazine of 5 rounds as fast as I could pull the trigger at a full size Elk target we outlined on a huge piece of cardboard down range. I just laid the rifle over the side of a round hay bail so not even a good steady rest. I just put the cross hairs of the Leupold 2-7 scope in the kill zone and cranked off 5 rounds in about that 6-7 seconds. It was getting dark and that was the plan, to simulate a hunting situation.
I would have been happy to have had all 6 shots in a 14-16" kill zone area to be perfectly honest. Instead they were all nestled in a group less than 5"! I consider that weapon more than acceptable for hunting game animals at acceptable ranges........FWIW......Cliff