I ran 6 mags (180 rnds) of Wolf 55Grn FMJ through the SR556. I decided on Wolf simply because of all the reports of fouling and malfunction issues with non-piston ARs. I have quite a bit of the Wolf for my Mini 14. I wasn’t taking any chances with my Bushie M4. I plan on running another 6 mags worth of ammo through it this coming weekend. When it’s all said and done, I plan on putting about 1,000 rnds of the Wolf through the gun before I try some "good stuff" (personally I like the Wolf ammo). UMC, Federal, Remington, etc. Once I put another 3-400 rounds of reloadable through the weapon I’ll see what Hornady Taps do. I’ve got some match grade ammo squirreled away that I'll try after that.
I’m using six MagPul P Mags, three standard and three MagLevel. The three standards come with the SR556 and I have a few of the MagLevel that I recently picked up.
Now I’ve only ran 180 rnds, but so far everything has ran just great. I have no evidence of “carrier tilt”. I just checked the buffer and everything appears to be perfectly aligned. But I’ll report back after 500 rnds and then 1000 rnds.
Just to let everyone know, ammo availability here in Southwest Oregon is easing up quite a bit. Prices are still high, but are starting to come down a little with the increased availability. Wolf and UMC 200 rnd bricks are showing up more and more nowadays.
Please remember guys, I’m just a half deaf, half blind middle-aged small-town rural manufactured home living bitter-clinger. I’m no expert by any stretch of the imagination, but I do really like this weapon. If I can rustle up some extra non-committed cash, I’m seriously thinking about buying a second SR556 and selling my Mini14 and Bushie. Fortunately I’m not married, no children, and self-employed. I don’t have to ask permission, just make sure that the mortgage and utilities get paid.
As I run this weapon more I’ll keep you all posted. I'll be surprised if I find any negative issues the the SR556.