Your good to go with the G17 mag in the 19. Can also use the non practical but fun G18 33 round mag. I also hated my first glock, but after asking around I figured out the trigger pull and have been in love ever since! Enjoy your G19!
Shouldn't be worrying about grouping with a Glock... it's a fighting handgun.
Work on hitting a man-size target with double-taps. Focus on the front sight, center mass.
If you want it to be a precision gun, get a Storm Lake barrel, Vanek Trigger Kit and some Dawson sights with have a MUCH smaller front blade and adjustable rear sights.
Glocks weren't meant to shoot 3 inch groups, but I've seen them knock down steel at 100 yards.
If this is a new gun, then be patient with it while it goes through its break-in period. It'll take at least a few hundred rounds. Make sure to clean and oil it faithfully. Once broken in, the trigger will be smoother, it will feed more reliably, and when you factor in the extra experience with it you'll be doing a lot better with it.
That said, though: If your Baby Eagle is one of the full-sized models, then given that fact and its single action trigger, you will probably always be able to shoot it somewhat better than the G19 (though hopefully not as much so as right now!). But in return, you can hide the G19 under a wide range of clothing, making it a great general-purpose carry gun. As long as you can hit a bad guy with it at combat distances, you're probably in the green.
If you still decide it's a piece of crap once it's been broken in and you've had some trigger time with it, then by all means sell it and get something that suits you -- that's the ultimate objective.
Good luck!
More help SE:
With a subcompact no less. That rocks.with a stock Glock 26 that I borrowed from a student.
With a subcompact no less. That rocks.
The only reason I brought up the distance pistol shooting was to point out that it probably wasn't the Glock.
I have a video of me hitting a steel target at 110 yards (laser ranged) with a stock Glock 26 that I borrowed from a student.
I'll try to dig it up and post it.
Thanks, I am new to hand guns,
Then you need to learn to take the propaganda Glockophiles spread about their gun with a pound or two of salt. Glocks, in reality, are no more reliable than any other good fighting gun, no more accurate, and are not the magical talismans they make them out to be, and they've got their fair share of disadvantages. But saying so will get you ganged up on as thoroughly as wearing Crip colors in Blood territory, and with about as much civility.