Just keep shooting at 20' until you can put them all in a circle the size of a softball. Then move your target back to 30' and do the same. That's what I practice at the most myself. I also do a lot of 2 to the com and 1 to the head shooting. Speed will come as you get better. Pistols are nothing like rifle shooting it's a whole new ball game. Good luck.

Here's my take:

Start at 3 yards and work your way back.

As far as ammo goes, I just use Winchester White Boxes in 165-180 grain FMJ.

How are you holding the gun? Stiff arm? Hard grip? How's your weak arm? Weaver? Isoceles? These play a role in accuracy, in my opinion.

You may want to invest with a magazine extension so your pinky finger won't be so loose. FYI: It does take a while to get used to a Glock, but just don't give up on it.

Oh I wont give up on it! I will practice more and I will improve I am sure.

I have wanted one for a while just never got around to getting one, I like the size of the 27, now to just practice, practice, practice!!

Assuming it's mechanically sound, your 27 should easily be capable of one-hole groups at twenty feet.

Keep practicing, and remember that proper trigger reset is the stumbling block for most people when mastering the Glock. Don't allow the trigger to fly all the way forward after a shot. Rather, control it and just ease it forward until you feel/hear the "click" of the trigger re-engaging. Then begin your next trigger press.