I haven't shot for awhile (more than 6 months). I've dry fired occasionally in that period though.

Still, I was a little disappointed in my first range session with the new 20 using the relatively light PPU JHP 180gr.

Off-hand standing, precision (group size) was about 4-6" at 7-15 yards. I'm used to 2-3" with the 19. Accuracy is better with the 19; I was shooting low with the 20. POI vs POA was displaced about 3" at 15 yards.

Just wondering if others who have both the 20 and 19, are you shooting equally with both? Or do you see some loss of precision with the 20 (something inherent in the round?)? Not worried about accuracy right now, just precision. Is it just getting used to the 20 -- it'll tighten up (this is my first non-9mm handgun since a long time ago). I'm sure some is anticipation and some jerking. But still, worse than I was expecting.

That being said, I was pleased that the recoil is much more manageable than I was imagining. And even as is, I think I could be practically effective for its intended use. I'm just not going to win any bulls-eye matches at this point.

I don't own a large frame Glock, but I've handled them. Own a Gen4 G19 and G34.

Your issue is most likely the difference in the Glock grip fit. For openers, my G19 and G34 have distinctly different grip fits. While nominally the same size frame, the groove and shape of backstrap are different.

The difference between your G19 and the large frame G20 is also different. Like many, I find the Glocks to be more sensitive than most pistols to grip-related inputs. Try dry-fire at home and see if you can identify any grip related displacement/consistency issues.

Yes. There is a noticeable difference in feel. The 20 does feel larger.

I'll look at that more.

I was getting about 6 inch groups with practice ammo at 25 yards with my G20SF. I swapped the stock sights for TFOs and dropped my group size to right around 4 inches. I can do better if really bear down or rest the gun.
And that PP ammo may not be the best. It was underpowered and dirty when I tried it. It was cheap and went bang but that was its only good point.
Try Federal AE for practice and see if you do better.

I find the 10mm especially thru the G20 to be a very very accurate round. Try different ammo and a little more practice. 2 inch groups are very attainable

The two older model Glock 20 pistols I owned seemed to be a bit more accurate with 155 grain loads, pushed pretty hot. I have been considering the addition of a new Gen 4 G20 as of late.

The larger size grip probably places your finger pad at a different spot than you are normally used to. Maybe experiment with more/less finger.

Thanks for the tips. Will try it out more.

What rounds were you using? (bullet weight)

Unless you had each pistol locked in a rest, how could you determine if either one is "more accurate?"

Perhaps you simply shoot one better than the other. In this case, the one with less recoil.

My other half has the G19 and I have the G20 and a bunch of other Glocks. I have not shot the G19 since I bought the G20, but accuracy should not vary much between them. Light loads is a good way to get used to the G20. What I do, and what I recommend everyone do is dry fire. Get used to when the trigger is going to break. Do it with your eyes closed. Do it while you are watching TV, but practice dry firing. I’ve not tried it, but I’ve heard that you should be able to place a dime on the front sight and it should not move when you pull the trigger. When ever I shoot a gun I haven’t shot for a while or a new gun, I will dry fire before live fire. It has never failed to work for me. The G20 is a big heavy gun, and the PPU JHP 180gr is a good practice round and POI Will differ with different ammo.

Pretty much any glock ( barring some dramatic mechanical or quality issue) will shoot three inch or less groups at 25 yards. Any bigger than that and it is likely shooter error.
A few years back I took a few glocks to the range ( no 10 though) with a wide variety of factory ammo and handloads to see if I could find a load that was significantly more accurate for purposes of competing in gssf matches. Mind you the accuracy demands for these matches are not high but figured every little bit helps, plus I also used the same pistols for some other matches that had much higher accuracy demands. Shooting 25 yards two hand standing over dozens of groups and multiple pistols the worst group was a hair over three inches and the best a hair over 2. Pretty much a tail chasing exercise as a 3” group was suffice to my purposes.

Also bear in mind that because of size, grip thickness, weight, and other factors....the G19& the G20 are very different pistols.

hundr, you are correct, VERRY different pistolas! I shoot both very well but it does take a few rounds for my muscle memory for each frame size to kick in. I DO find that the lighter loaded rounds are more accurate than super hot ones. I have spent years playing with loads for my 20s, (5 of them).Light for accuracy, NUCLEAR for up close Wild Hog killin!