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P320 Compact Shooting Low

This is a discussion on P320 Compact Shooting Low within the P250 & P320 Modular Pistols forums, part of the SIG Sauer Pistols category; My p320 is also a 9mm compact. I am going to try and change the #6 front sight to a #8 front sight and see ...


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P250 & P320 Modular Pistols P250, P320, and Exchange kits

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Old 05-16-2017, 05:01 PM   #16
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My p320 is also a 9mm compact. I am going to try and change the #6 front sight to a #8 front sight and see if it does any better. If not, then I'll know that it's likely a problem with my shooting.
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Old 05-16-2017, 05:17 PM   #17
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Same pistol - different factory sight set up. Huh. Anyone know why a gun manufacturer would purposefully do this? Makes no sense to me. (No more #8s in the parts bin at the factory production line perhaps??).

Anyway twoface01, mine with #8s front and rear is dead on at 10 yards with a combat sight picture hold. Good luck with your front sight change. I think that it will be worth it for you.
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Old 05-16-2017, 05:43 PM   #18
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Originally Posted by SigMHS View Post
(No more #8s in the parts bin at the factory production line perhaps??).
Yup, this ^ would be my best guess. Like the grip modules, they just grab whatever is nearby. My 9mm P250s both have #8s front and rear, but my 9mm P320 came with #6 front and #8 rear. As you said, makes no sense.
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Old 05-16-2017, 06:22 PM   #19
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Perhaps this article will be of help here:

https://www.realgunreviews.com/sig-s...sight-numbers/

Please note that both the 9 mm and the .40 320C normally ship from the factory with #8 rears and #6 fronts, and that changing your front sight to a #8 will only raise your POI by a mere 2 inches at 25 yards.

It sounds to me like your POA/POI discrepancy is larger than that, so I'd first exclude problems with the shooter before I began to monkey with the gun.
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Old 05-16-2017, 08:17 PM   #20
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Originally Posted by Yetskii View Post
for me is was 2-3 inches at 10-15 yards with 6/8, so went with 8/8....Also, check your sight alignment....mine was off to the left a little...moved to right and I am much more in there...although my groups are a tad larger than I would like....but still in the kill zone
Thanks, I'll have to look into checking sight alignment too.
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Originally Posted by stlmia View Post
Sure, checkout page 55 in the P320 manual. Link and text below.

https://www.sigsauer.com/wp-content/...16/07/P320.pdf

10.3 Elevation (Up/Down) Adjustment
There are different height combinations available for the front and rear sights.
The sights are numbered according to their height. You can change elevation by changing either the rear or front sight. It’s easier if you change the rear sight first. There are six rear sight heights available. Each rear sight change will move the impact of the bullet approximately 2” at 25 yards. There are five front sight heights available. Each front sight change will move the impact of the bullet approximately 1” at 25 yards.When changing sights, remember this rule: NUMBERS UP, GROUPS UP; NUMBERS DOWN, GROUPS DOWN. This is true for both front & rear sights.
Thanks, I remember reading that over 700 rounds ago LOL.


Quote:
Originally Posted by DBS View Post
Perhaps this article will be of help here:

https://www.realgunreviews.com/sig-s...sight-numbers/

Please note that both the 9 mm and the .40 320C normally ship from the factory with #8 rears and #6 fronts, and that changing your front sight to a #8 will only raise your POI by a mere 2 inches at 25 yards.

It sounds to me like your POA/POI discrepancy is larger than that, so I'd first exclude problems with the shooter before I began to monkey with the gun.
For the record mind is also a 6/8 setup, 9mm COMPACT size, I think 1/2017 manufacture date.

I never made it past 15 yards during target practice since it's not hitting exactly where I want. I'd shoot mainly 3-5-7-10. My groups are decent-- fist-size, up to 7 yards. My concern grew at a range I go to where I couldn't hit the steel plates 6" diameter I'm guessing at 10 yards, but have no problems doing so with my other pistols-- including two Shields.

Everyone raves about the P320 accuracy, I thought of ditching it several times (even wondering if I'm a "40 guy" since I hit with my 40SW 2022) but kept giving it more chances (rounds).

Guess my makeshift rest won't do and I'll need to retest and if anything contact Sig for the #8. I'll try at 10, 15, 25 yards to compare those numbers.

Shield LEFT, P320 RIGHT 5 yards. Tested 5 yards.



Wish it didn't take 700+ rounds to find a sight alignment issue.
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Last edited by greeenteeee; 05-16-2017 at 08:41 PM.
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Old 05-17-2017, 05:39 AM   #21
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I don't know if a handgun sighted in at 15 yards which I believe is where Sig iron sights are set for should shoot low at 3 to 5 yards. My AR is sighted in at 25 yards and shoots about 1.5 inches low at 10 yards. I think it would be worth going out in distance and see if accuracy is better. Or maybe the difference in distance between sights and barrel doesn't matter as much at handgun distances?
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Last edited by sig78257; 05-17-2017 at 07:36 AM.
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Old 05-17-2017, 10:14 AM   #22
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I don't know if a handgun sighted in at 15 yards which I believe is where Sig iron sights are set for should shoot low at 3 to 5 yards. My AR is sighted in at 25 yards and shoots about 1.5 inches low at 10 yards. I think it would be worth going out in distance and see if accuracy is better. Or maybe the difference in distance between sights and barrel doesn't matter as much at handgun distances?
15 yards sounds like something I've read from Sig too.

I plan on taking it out to distance. This is how my front sight is and how it came, but I assumed it wasn't just haphazardly installed on the gun.

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Old 05-17-2017, 10:25 AM   #23
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^^^ A #8 front sight is what you need on there. But not the first time I have seen a 9mm 320 with a #6 front sight. Even Sig themselves recommend #8/8 for 9mm and #6/8 for .40.

My 320C in .40 caliber came with #8/8 sights stock.....I now have the proper #6/8 sights on it and feel so much more confident in it.

Good read here on it....

https://www.realgunreviews.com/sig-s...sight-numbers/

Last edited by LFZ; 05-17-2017 at 10:58 AM.
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Old 05-17-2017, 10:40 AM   #24
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Originally Posted by twoface01 View Post
I recently bought a Sig P320 Compact with SIGLITE Night Sights. It currently has a #6 front sight and #8 rear sights. I've taken it to the range a few times now and it seems like the gun is always shooting low. Even today, I took it to the range and had to aim pretty high in order to hit the steel targets. Is this to be expected from my P320 or is it possible that I am doing something wrong? I am a newer shooter and it's definitely possible that my form or sighting could be off, so any tips would be helpful. I have had a couple of other more experienced shooters try shooting the gun and they also were shooting low. As far as my sight picture goes, I've tried aiming with a 6 o'clock sight, a center hold sight and a combat frame hold sight .. I just can't seem to hit the target without aiming well above the target. Any suggestions would be appreciated. Thanks!
This is a common complaint and has numerous threads discussing the low POI. I sloved it by replacing the front sight with a #8. I was frustrated with the P320 because I had to change my front sight picture when all my other pistols shot the same. If it bothers you put on the #8 front sight. My P226 Legion SAO came with a #8 and it makes me wonder why these two SIG's came with different sights.
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Old 05-17-2017, 11:41 AM   #25
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Originally Posted by twoface01 View Post
My p320 is also a 9mm compact. I am going to try and change the #6 front sight to a #8 front sight and see if it does any better. If not, then I'll know that it's likely a problem with my shooting.
Afternoon twoface01

Switching from #6 to #8 front is not much change in POI (probably less than 1/2" at 15 yards or 1/4" at 7.5 yards).

Changing the rear sight will gain you about twice as much per number change.

My 320C now has a #8 front & #10 rear & shoots to bottom of a 2" circle at 18 meters using top of front sight centered on the 2" circle.
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Old 05-17-2017, 04:45 PM   #26
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When I got mine almost a month ago I would've sworn the sights were off because I was shooting low and/or low and left, and a friend that was with me one day at the range was shooting low too.

But, I realized I was the reason and not the gun. My grip was too harsh and my finger placement was wrong on the Apex trigger. I have since worked thru my mistakes and tightened my groups to 2.5" at 7 yards and/or place them in the larger bullseye area at 10 yards...on occasion I am putting them up and left though.

500+ rounds and some grip & sighting changes made the difference. And I don't buy in to the high bore flippy **** either...it recovers well.
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Old 05-17-2017, 08:19 PM   #27
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I had this same issue ad SIG sent me a replacement front sight.

Give SIG CS a call
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Old 05-24-2017, 02:20 PM   #28
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I had this same issue ad SIG sent me a replacement front sight.

Give SIG CS a call
I finally called Sig this morning, asked for my sight picture, serial number for my 9mm compact, they suggested shooter error. I said I assumed it was sighted from the factory (I thought I've read in the manual or else where it was sighted 15 or 25 yards)-- they said they "install the sights and 'eyeball' it," but they later said they sight it at 10 yards

Though I didn't demand anything from them, they told me they'd have to take it in and shoot it obvi and said it'd cost $100-130 (forget exactly) for ammo and testing, if they didn't find it a warranty issue, I guess. 4 week turnaround. They were more keen on giving a quote more than anything.

I chopped up a wooden dowel, flattened one end of it, drifted it to center-- I'll shoot rested at various yards to see how it goes.

This is AFTER. I don't have 20/20 but this was to me more "eyeballed" than what it was originally.



I'll do more shooting rested, hopefully that'll resolve the "LEFT." Looked at replacement cost of a front sight if I have to pay out of pocket for this, only found this:

SIG SAUER SIGHT, FRONT, NIGHT SIGHT #8, BLUE, TWO TONE | Brownells
EDIT: this isn't the right part but couldn't find one P320 specific.

Disappointing I'd have to dish out $50 when I opted to pay extra for the Siglite sights to avoid having a gunsmith install them and zero the pistol. Expecting it to be zero'd from the factory may be a bit naive on my part but my first Sig was spot on out of the box.
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Old 05-24-2017, 04:37 PM   #29
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I will also agree with everyone that the sights are the key, at least on the P320 F 9mm. I use that pistol for competition and the stock sights almost always gave me a low hit. After a couple thousand rounds I changed to the Dawson fiber optic front and black rear sights. I also replaced the stock recoil spring and guide rod with the Gray Guns Fat SS rod and 1911 recoil spring set. Far more accurate setup for me.

The P320 Compact 45 is a different story. If I level the front stock sight with the top of the rear sight it is about as accurate as any pistol I have owned. Not sure why the sights on the 45 ACP are better tuned than on the 9mm but they are, IMO.
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Old 05-24-2017, 05:04 PM   #30
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I still find this extremely odd so many different combinations are out there on various 320s. How on earth did this happen? I have the 6 front and 8 rear sight and notice I shoot a bit low myself. Wonder if the 8 8 combo would be for me. I'm gonna bench shoot it next range session and if low give sig a call and try and get an 8 front sight.
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