Calculate Poi with BC and Speed

[Swadger]

If you have a center hit with one bullit say 168 gr Federal goldmedal match
Can one calculate what the poi will be with a 155 gr lapua scenar factory ammo at 2600fp. Maybe a lame question sorry but im having a meltdown hehe

 

[The Surgeons Ghost]

Re: Calculate Poi with BC and Speed

Are you asking if the 155's will have the same zero that the 168's do? Not sure what you are asking here.

 

[phillipjr]

Re: Calculate Poi with BC and Speed

I'm confused with your question too.

 

[Swadger]

Re: Calculate Poi with BC and Speed

No sorry think its my bad english. Simply if you are zeroed with a 168gr
Sierra match king at 2500fps. Is it possible to know where a 155gr lapua scenar at 2600fps will hit?

 

[roggom]

Re: Calculate Poi with BC and Speed

I believe op want to predict the POI of the 155 scenar in a rifle that is zero's with 168 FGMM. Yes, I am sure you can extrapolate the information, but I do not have the formula. You can contact Bryan Litz and ask if he has the formula to do this, as he is a ballistician.

I can only predict the POI will be higher, as for true POI, no one knows the harmonics of your barrel, the bullets can strike left or right.

Edit: OP if you want to predict further out, just enter the data in your ballistic program and make another drop card, and correct your zero. I like the G7 program, as it has hundreds of bullets preloaded into the program http://www.gseven.com/ballistic-program

 

[cavemanmoore]

Re: Calculate Poi with BC and Speed

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Markusltr</div><div class="ubbcode-body">No sorry think its my bad english. Simply if you are zeroed with a 168gr
Sierra match king at 2500fps. Is it possible to know where a 155gr lapua scenar at 2600fps will hit? </div></div>

Your english is fine, I understood what you were asking. Now if only I could answer your question

 

[Swadger]

Re: Calculate Poi with BC and Speed

Ok thanks alot guys!