Yeah, really let the slide slam home if you are mistakenly being gentle with it. Commie guns must be dealt with sternly.
Could be the magazine, do you have a second one you can try?
Mine loves hollowpoints, both the Wolf Gold and the Reed's Custom loads, but if that's all you have tried, get some FMJ and see if it makes any difference.
If none of the above is the problem, it may be worth a shot to get a Wolff extra power recoil spring. It will bring the slide forward with authority, if it can't chamber a round with good mags, FMJ ammo, and a Wolff spring, something is wrong that probably needs a gunsmith to fix.