I am curious on how you calculate bullet drop when you are zeored for one round but use another?

Example:

110g 300bo 50 yard zero.  Now I use a 150g round.  How do I know the difference between these 2 rounds and their POI?  Its easy to see a chart with drops but thats based on the zero for that round.  Do you have to figure out if a 110g in zeord at 50 yards then a 150g with that zero is zeored at 60 yards?  Then go back and run the chart?

Ballistic Calculator on your phone such as:

STRELOK BALLISTIC CALCULATOR

You can store the various loads/caliber/coefficients/reticles, etc then recall as needed.
The one mentioned above will display graphic POI through reticle and numerical table.
Plug in one, then the other and compare.

Sight in & zero for your baseline everyday load, then test all the other rounds (5-shot groups) for POI & drop at various yards then again with turret come-ups or with hold overs.


Then compare to the ballistic programs to see if they are close to what you get in the field.


Make a drop/ holdover table and put it in a clear plastic adhesive envelope (aka shipping manifest) -stick to your stock.