Marine6680 said:
I did find myself wanting to line up the sights in a way that had the front post just slightly high... it may be the way the three dots line up, and the fact that there is no gap to speak of between the rear notch and front sight. The lighting in the range made it difficult to focus on the sights well... so getting an even sight picture required more concentration. So it added about an inch of vertical stringing to the groups, as I fought that tendency.
My eyes aren't great, thanks to a cataract in my strong eye -- hopefully to be fixed early next year; lighting (at an indoor range) can be a real problem for me.
The FNS manual isn't much help with regard to a recommended sight picture. It says you should use the "COMBAT HOLD" which means something like the image shown below, with
the TOP of the sights aligned and even with the middle of the intended point of impact, (i.e., POA = desired POI). H&K recommends this same hold with their new VP9.
SIG, in its manual doesn't make a recommendation, but makes it clear that there are any number of different front or rear sight heights available, and you can contact them for replacements. (Generally, I think, these sights are free.) Many shooters familiar with SIGs recommend the "combat hold."
When you have a number of different guns, it can be a problem. Glock, at least in the manuals I have, recommends their own UNIQUE sight picture. (Most of my Glocks, over the years, had or were fitted with adjustable sights, and I just tweaked them to work more like the "combat hold.")
A number of shooters on the FNH forum were shooting low, too. If you haven't joined the FNFORUM, you might want to.
http://fnforum.net/forums/forum.php They recommend moving to the sights available from
Sevigny PerformanceThere are various front and rear sights available along with recommendations.
http://sevignyperformance.com/products-page/fns-competition-sights/
You can also use the
Brownells Sight Correction Calculator to know exactly what you need.
http://www.brownells.com/GunTech/Sight_Correction_Calculator/detail.htm?lid=13093