[daveccarlson]

I had to move the elevation on my Tula M44 up to 7 for 700 meters to hit the black at 100 yards (the carbine shot very, low as opposed to very high like yours). I replaced the front sight and hood with another Tula hooded post and now I only have to move the rear sight to 400 meters to hit the black at 100 yards.

Here is the Brownell's calculator as to how much alteration of your sights may be required:
https://www.brownells.com/.aspx/lid=13093/GunTechdetail/Sight_Correction_Calculator

The alternative to a higher front sight to lower the POI is to swap out, change, or modify the rear sight slide... Many of the refurbished Mosin-Nagant rifles show evidence of having been ground down a bit already. Certainly sights so modified look better than a piece of tubing cut down over the front post. There are also commercially available adjustable front sights. http://www.smith-sights.com/
Good luck!

 

[daveccarlson]

If it is a blade or "barleycorn" front sight you'd have to get a taller replacement to bring the POI down.

A little adjustment goes a long way. The Soviet '55 Mosin Nagant manual explains every shift of 0.5mm in height will shift the POI at 100 meters by 8cm. On a Mosin-Nagant carbine, each shift in height by 1/2 a mm will change the POI 12cm.