[Shiva1958]

Buy a cheap laser boresite on Amazon to set it up initially to save on ammo. They are really handy. I'm not familiar with the romeo sights, but none of the red dots I've tried would co-witness with the iron sights unless you had suppressor height sights. When you get to the range, I would zero it at 5 yards. Aim at a dot on the target. Keep shooting and adjusting until you hit the dot. At that distance the bullet holes should be touching. Send the target out to 10 or 15 yards. If you can get a 9 inch group you're good enough. If you're a really good shot with a pistol and think you might want to make a 15 yard head shot on an active shooter, which is possible with a red dot and a good trigger finger, work your zero out 5 yards at a time until you get to 15 yards or whatever the max range is for where you shoot.

All that said, I'm not big on red dots, lights, and lasers on guns, because they always seem to break. I put one on my new Springfield XDM Elite Compact 10mm and it came loose and quit working the first time I took it out. I mounted it myself using the Loctite that already was on the screws. I remounted it using my own Loctite, so we will have to see...I can shoot it way better with the red dot than with iron sights. My other issue with red dots, is they seem to make the guns a lot bulkier. Now that it is summer, I don't even try to carry it.