the following ammo out of an 18" SEI M1A:

1) .308 Hornady 155 gr FPD (or whatever versions is MOST READILY available)

2)  Winchester 147 gr. FMJ Q3130

3)  South African 147 gr FMJ

I'm trying to find what a good general purpose zero for the IRON SIGHTS would be, something a long the lines of the 50 yard zero for the AR15.  I use the LTC Chuck Santose zero and that works great.

So, if this isn't too much to ask for I will REALLY appreciate it!

ETA:  Is this something different than FPD? New loading

Just renewed my membership!  Can't believe I let it lapse...

So, what is needed to come up with a table for each of the rounds listed?  Bullet coefficient and FPS, right?  What is the easiest to use program that can do all of this?  Thanks.

exbal

Exbal  seems pretty good.  Is this one of the better programs?  Easy to use?