I know Greg is a fan of ASC, and I don't doubt his success with ASC mags.
I have tried several different ASC mags, and I usually buy three to be able to have a chance at a good one. So far I have not been successful. I bought three 6.8 SPC mags, none feed reliably in three 6.8 SPC rifles, and two wildcats, based on the 6.8 SPC case. I bought three 10 round ASC mags, for a 204 Ruger version of an AR-15. All three experienced feeding issues. On a WY P-Dog hunt, I had a pretty good pile of misfed rounds with the bullets, setback. I was a little grumpy as none of my other 223 mags supported the longer COL of the 204 Ruger, so for that trip I lived with occasional misfeeds. When I got home, I ordered PRI mags, just because I have had flawless function, with them in the afore mentioned 6.8 based rifles. I do not like the price I had to pay for PRI mags, and in my case I had to wait a few weeks until they came back in stock, but my 204 Ruger AR-15 runs like a clock with them(PRI 5.56 mags).
I use Lancer magazines, in my 458 SOCOM, and just for grins, looked at them for the 204 Ruger, and the 223 Rem. For the 204 Ruger, I will stick to PRIs, and for the 223 Rem., Pmags get the nod.
So my experience, with ASC mags, is different than Greg's, and I won't buy them going forward. I just pay PRI's prices, and am happy they feed well in my rifles.
Squeeze