good news everyone!! So on hearing how bad an SR556 performs with tulammo i decided to try out my new case of 1000 rounds .223 tula. $270 well spent btw. I also have 450 rounds of tulammo .45 so why not test out the XDs, I also have a new XDM 3.8 compact .45 i have yet to fire.. brand new in its case. careful now, pay attention cause this all happened in 30 seconds!!! maybe... I loaded my pmag of 30 tula in my SR556 quickly did a suppress fire drill -upon the 20th round or so i transitioned to my IWB holstered XDs and fired 6 rounds of tula on target at 30 Ft. -on empty i reholstered, transitioned to the AR finished the mag, dropped and loaded a new 30 rd. pmag of tula got about half way, -transitioned to my XDM 3.8 fired 14 rounds of tula .45, reloaded fired 14 rounds of wolf .45, reloaded fired 9 rounds of tula .45 swapped back to the AR finished the mag. Blamo! not a hicup!! this was done in freezing rain the weapons were cold-room temperature. to the guy trading in his xds for a g26, mistake, i sold my g26 for the xds, never looking back..