Originally Posted by
JMS
^^^Ding.
Sight radius in inches x vertical POI deviation in inches / Range to target in inches.
Wait for your rear to arrive, and install it. Leave the stock front on the gun.
Measure your sight radius.
Shoot for group. Note how far under or over your desired POI the groups fall.
Use the formula. Add the result to stock front sight height if printing high. Subtract result from front sight height if printing low. That'll confirm whether or not your Dawson front is the height you need/want to go with your Dawson rear.
If not, the fact that it's uninstalled means you should be able to exchange it for the height you require with a minimum of fuss.
EX: I have a CZ that's shooting 4" over the blade @ 25yd. If I want it POA/POI, 4" is my input. If I wanted it to print 1" over the blade, I'd use 3" as my input to the formula. Range input is 900".
So -- for my CZ, it'd be:
5.625" x 4" / 900" = .025" more front sight height required, for me.