Once I ditched the 10 round magazines and bought the extended 19 rounders, my pistol has been very reliable with CCI standard and Minimags. I've put around 800 rounds (mostly Minimags) through mine so far.

I still point my finger at the 10 round magazines for my initial reliability problems, mine are gash and just live in the cupboard now. My 10 rounders have poorly moulded mag bodies which bow inwards and pinch the followers, recoil springs which were far too strong, and even with the insides of the mags sanded, the followers would still stick when feeding ammo. Had none of these issues with the extended ones (read also includes original 13 round mags as same body used for these and extended, 10 round mag bodies completely different.).