took the 458 socom RRA midlength to the range today along with the easy mags. the socom does NOT like these mags. i had numerous fail to feeds across the board with all the easymags. switched to standard AR milsups no problems. i will be reserving the easy mags for .223/5.56 only. the socom rounds would lodge with the nose of the bullet above the chamber 2 or 3 times per mag.