FFP against SFP Scopes.?

[angrybear]

I have a question please.

I have a sfp scope and it is zeroed to 40 yds if I shoot at 30yds or 50yds I need to take into account mil Dots up or down to be on target.

If I get a FFP scope will I still need to do the same mildot adjustment to be on target or will it be on target if I zoom in at 50 and zoom out at 30??

Is it just the recital that changes??

Try this example, no shooting involved;

Put a ruler at 25yds aim at 0 note where 1 dot is, now change the mag, again aim at 0 note where the dot has moved,
repeat changing mag each time and you will see that at lower mag 1 dot measures more than at high mag.

With FFP 1 dot would measure 23mm at 25yds for every magnification.