I'm not OP, but yes I think we are waiting for answers on a lot of those questions you pose.

I can address one of them, however: I believe Sigs are zeroed at 15 yards, actually (I use to think it was 25, too). The ballistic difference between 7 and 15 is fractional, and the only real effect is the sight offset from bore, and that could only be a half inch or less. In fact it's about 1/4" for 9mm. OP is reporting 1-1/2", way too much drop for ballistics at that range.

As far as how did it shoot before aftermarket sight installation, yep I am waiting for that info too.

This message has been edited. Last edited by: kkina,

Made it back to the range and did some extensive shooting. Found that a large part of my inaccuracy (low rounds) was apparently me dropping the front of the gun as I was pressing the trigger. With a lot of concentration I corrected virtually all of the low POI.

I also did extensive work with the G17 and the M&P2.0. While I enjoy shooting the G17 a lot, my overall accuracy isn't what I'd like; I continue to impact left of center. My overall accuracy with the M&P2.0 was much better than the G17, but the groupings were not as tight. As a reference I'm talking 15 rounds in a three inch circle, most impacting within an inch and a half. I was able to attain that accuracy easily with all three, but the G17 was one inch left of POA.

I also tried a 320 FS with an Apex flat trigger. Wow, that small $40 change makes a world of difference. I am having the Apex Flat trigger put on the compact tomorrow and ordered a Full Size from another local fun shop.

So overall impression, I still love my G17 the most, but I can't seem to fix the left POI. I'm actually the most accurate overall with the M&P2.0 but I just can't warm to going back to the M&P. With more practice I'll be able to correct, even at speed the 320's slight low tendency.

The 320 is now my primary HD, Range, competition and travel gun.

Glad you figured out the problem, and that it wasn't the gun (we can report back to the Army to proceed with purchase). It's good to rule everything else out and then proceed with corrective training. Most of us have had to confront the anticipation demon at some time or other.

As far as your issues with the G17, Google "Glock shoots left". I think you'll find you're in good company. It has something to do with how a block, sorry, Glock, fits in a human hand, and how the long trigger pull magnifies any tendencies.

quote:

Originally posted by kkina:
Glad you figured out the problem, and that it wasn't the gun (we can report back to the Army to proceed with purchase). It's good to rule everything else out and then proceed with corrective training. Most of us have had to confront the anticipation demon at some time or other.

As far as your issues with the G17, Google "Glock shoots left". I think you'll find you're in good company. It has something to do with how a block, sorry, Glock, fits in a human hand, and how the long trigger pull magnifies any tendencies.

I've pretty much given up on fixing the Glock issue. Hundreds and hundreds of rounds over maybe nine months of testing and trying different methods. I reached a point of decreasing returns as I became obsessively upset.

UPDATE:

Earlier this week I found myself a new FS at one of my local fun shops so I went ahead and purchased it.

Next step was to take it to the range and have their GS swap the Dawson FO's on the compact to the FS and place Night Sights onto my Compact. (I also had Apex Flat triggers installed)

So the GS knowing I had had issues earlier took the FS, now dressed with the Dawson FO's into the range to test it. Wouldn't you know it, shooting low! He called me right away and said as much. Tuesday morning he's calling Dawson for a replacement front sight.

As an extra note, he used calipers and said they do match the proper height, but something isn't right sooooo....

So we're basically back to "we don't know why"? Putting a lower front sight will cure the problem, but we still don't know why the gun is shooting low in the first place?

quote:

Originally posted by kkina:
So we're basically back to "we don't know why"? Putting a lower front sight will cure the problem, but we still don't know why the gun is shooting low in the first place?

It's not gun; it's guns. Plural.

In other words, it's the sights; not me, not the other three shooters, not the guns.

Yes, understand, it was your final comment that concerned me...

quote:

As an extra note, he used calipers and said they do match the proper height, but something isn't right sooooo....

If the "correct" sight is installed, and the gun(s) shoots low, then it's something else by definition. Or am I missing something? Just want to help.

I don't know, something about the sight set is wrong. That's the point.

The chance that I happened to buy two guns that shoot low, highly improbable.

I see what you're saying, Bro. Well, then, keep us updated on the situation.