Thread: Ballistics of various calibres and coefficients

I put this chart together the other night using max load fps from an ADI manual, then input them all into the BallisticAE program.



I used accubonds and sst's for the projectiles as I have found they perform really well on the animals I have shot.
While better speeds could be easily obtained from some of these calibres, I reckon it shows that between the bullet diameters there is very little advantage within normal hunting ranges for a superior coefficient pill to give a real advantage.
What do other members reckon?


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Drop is pretty much irrelevant.

Originally Posted by gimp

Drop is pretty much irrelevant.

If you dial, if not its quite relevant.

Originally Posted by gimp

Drop is pretty much irrelevant.

But I guess your hinting at windage, which is very relevant at longer ranges and probably why you love the 308 so much

Nah like to get something that "doesn't drop" at "hunting ranges" it has to be pretty absurdly large so you're always going to have drop otherwise and the differences in drop between standard cartridges aren't real world practically different so it's pretty much irrelevant

Yup, caliber and projectile selection is much less of an issue than some of the epic internet debates make you believe.

Litz says it plainly : range finders make "flat" calibres irrelevant. If you plan on dialing you pretty much have to range (humans tend to suck estimating).

Originally Posted by FRST

I put this chart together the other night using max load fps from an ADI manual, then input them all into the BallisticAE program.



I used accubonds and sst's for the projectiles as I have found they perform really well on the animals I have shot.
While better speeds could be easily obtained from some of these calibres, I reckon it shows that between the bullet diameters there is very little advantage within normal hunting ranges for a superior coefficient pill to give a real advantage.
What do other members reckon?


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The moment of enlightenment...

Do a chart for windage as others have suggested, say 4m/s or similar...

Also, if you're not dialing at 700 yards (max distance on chart) you will miss no matter what cal you use...

Also, also, nice hand writing.

140gr 6.5-06 at 2950fps to 1000yrds.



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140gr 270win @ 2950fps to 1000yrds.


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150gr 30-06 at 3050fps 1000yrds.


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165gr 30-06 2950 fps 1000yrds



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Again, ballistic coefficient means diddily squat for hunters.


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It's relevant, you've just gone out of your way to select bullets with very similar ballistics coefficients rather than actual good bullets that someone looking for long range performance would use, so, whatever

BALLISTIC COEFFICIENT IS IRRELEVANT GUYS


*posts how bullets with the same BC perform the same*



Like, no shit

150grain round nose launched from a 308 win at a realistic 2850fps.

Attachment 22276

178grain amax launched at a comfortable 2975fps from 30-284