I know this has been done to death but I'm looking for some input from someone who had the exact same problem. Most of the posts I've seen are for shooting low - I have the opposite problem. My Sig is a P226 9mm with a Semi-drop Barsto that was just put in. It did require some fitting but only the left and right of the chamber where it fits the breech. My sights are #8 front and rear plain black target type. Using a 6 o'clock or pumpkin on post hold, with or without a rest the gun shoots 2 to 2.5 inches high with a 1.5 inch group(windage is dead on) I'm using this gun exclusively for IDPA and want POA-POI dead on at 15 yards. I don't believe switching to a #6 front sight will make this happen since the #6 2" drop is figured for 25 yards(1.2 inches max correction at 15 yards). Any input would be appreciated.

P.S. My load is 124 FMJ hand load at 1050 fps. 1.155 OAL.

Changing your rear sight to #6 rear will lower your POI about 2.4 inches at 15 yards (15/25 x 4). You may need to change both the front and rear to get the correct elevation change. Just do the math: 1 inch for the front and 2 inches for the rear, for each number change at 25 yards.

I ordered today a set of plain serrated Heinie sights for the front and rear(set for a P220). Theirs are a #6 front and a #8 rear. Because of different manufactures difference I'm hoping this will get me back on target. I'm not a big fan of the Sig contrast rear sight and really wish someone would offer sight sets like Sig so you can mix and match what works for your gun. Keeping fingers crossed. Worst case scenario is getting a target blade from LPA and stoning it down to suite me.

I spoke with Barsto about it today and they said some guns just shoot high. My primer strike is centered and the barrel is square in the slide. He basically said every manufacturer has a pile of go to sights when there is a high or low one in the bunch.

Aim lower. Or am I over simplifying the problem? My Glock 19 tended to shoot to the left a bit so I always aimed to the right, a bit. Simple fix.

The Sig sights on your gun should have the current sight number on them. Sig 45 ACP take a #8 rear and a #6 front sight when installing Sig sights. My 220 R came that way from the factory and that is what Top Gun Supply sells in their night sight kits for a Sig 45 ACP.

If your barrel is a 45ACP or 40 S&W the Sig guns in these calibers take a #8 rear and #6 front. If the barrel is a 357 Sig or 9mm then gun would take #8's front and rear.

Other manufactures should number their sights the same based on height that are the same as Sig but there is no guarantee and I would email Heinie to check and make sure.

quote:

Originally posted by fyimo:
If your barrel is a 45ACP or 40 S&W the Sig guns in these calibers take a #8 rear and #6 front. If the barrel is a 357 Sig or 9mm then gun would take #8's front and rear.

Interesting. I've got a 9mm P226 manufactured around the year 2000 and it has #8 rear and #6 front. I bought the gun used, but it was in LNIB condition and it's doubtful that the previous owner replaced the front sight. I wonder if Sig went from #8 rear/#6 front to #8 all-around relatively recently?

By the way, the gun shoots straight with 147 gr bullets and a bit low with 124 gr.

My relatively new P220 Carry SAO purchased in 7/08 came with #8 rear and #6 front. My P226 which I bought used and is a West German model from the 90's had #8's front and rear. My main info other then that is from Top Gun Supply who is a sig parts distributor and they sell their night sights in complete kits based on caliber and what I said above is what they recommend and sell. I know that's what they sell because I have bought and installed 6 sets on my Sigs.

The bullet does not travel perfectly flat and exactly the same with different bullet weights and the point of impact will vary by round type, weight, and even design. That coupled with distance and you have enough variables that the sights act as a general sight point. You bullets will move around the target based on weight, velocity, and distance. If you wanted to be super precise you would adjust your sights for one load of ammo and always shoot that load.

Got my Heinie sights today. Brought my micrometer to work and came up with some interesting #'s.

All measurements in MM's:

Factory Sig rear height #8: 6.35
Warren tactical rear sight height: 6.77
Heinie rear sight sight height: 7.54

According to the sight charts for every .28 mm change in the rear sight you will influence 25 yard impact by 2 inches.

Heinie front sight stamped #6: 6.9 mm
Factory Sig #6: 5.88 mm

For every change in front sight of .14 changes point of impact by 1 inch at 25 yards

So after crunching all the numbers changing out the front and rear sights with the Heinie sights will get me an impact about 1/2 inch high at 15 yards. I'll have a range report this Friday.

Did it shoot high with the original barrel?

It shot a little high at 15 yards w/the factory barrel not 2.5 inches high like the Barsto.

This message has been edited. Last edited by: chris240,