I had my 19x out yesterday and today both days shooting over 100 rounds of wally world Winchester, some Remington 115 grain and also hydro shock 124 and NATO 124 grain fmj.
All I can say is this 19x runs great and accuracy is right on!! Love the grip and have been carrying it for a week now in my alien gear rig with no problems.
I have 3 other glocks and have no regrets on the 19x. Notice the heart shaped hole I shot out for ya!!