And I'll join in like the third Three Musketeer, the fat dumb one, Yes they will do fine. There are no cartridge specific magazines for the 6X45. The same mag will feed, 17 Fireball, 17/223, 17 Remington, 20 Tactical, 20 Practical, 221. Fireball, 300 Whisper, 223/556, 6X45 and 6 TCU and a whole bunch of other iterations off the same case too numerous for even me to rattle off.
Last Edit: Jun 6, 2012 18:57:45 GMT -8 by GLSHOOTER
The best firearm for self defense? Any loaded one will do.
Again, like the others have said, they work fine. I have two uppers (5.56 & 6mm) and mark my PMAGs appropriately. I have found that the longest COL (Case Overall Length) I can load a 6x45 to is 2.258 and have completely reliable feeding. I've tried 2.260 and a bit longer but have experienced a hang-up or two with the PMAGs. There are some 5.56 mags that will allow a longer COL on 6x45 because they're steel mags without the rounded bits of a PMAG.