First Bolt action

[pharmseller]

Same question, how much more useful is the 6.5mm Creedmoor than the 7mm 08?

From my post above, the 140 grain 6.5 mm bullet has a bc of .509, while the 7mm bullet is .485.

The Creed mv is 2731, the -08 is 2953.

Can someone plug these numbers into a ballistic program and determine the distance at which the Creed overtakes the -08?





P

 

[Member 5605]

From my post above, the 140 grain 6.5 mm bullet has a bc of .509, while the 7mm bullet is .485.

The Creed mv is 2731, the -08 is 2953.

Can someone plug these numbers into a ballistic program and determine the distance at which the Creed overtakes the -08?





P

6.5 used a 140 eld-m
7-08 used 139 SST



The difference becomes evident with a 12mph cross wind... the wind starts at 388yards as plugged into the app.



So really at about 300y, they start to wander.


I should note, I also used a G1 not G7 drag model.

 

[Member 5605]

Here are the specs using the above Nosler stats:



Not mich of a comparison at this point.

140 Accubond vs 140 Accubond



Wind drift again: 388y, 12.2 mph crosswind...

 

[pharmseller]

Thanks for the info. I'm more of a velocity guy, though, so what does that comparison look like?




P

 

[Member 5605]

Thanks for the info. I'm more of a velocity guy, though, so what does that comparison look like?




P

Kind of the only way to align them..

Nosler 140 AccuBond

 

[pharmseller]

Kind of the only way to align them..

Nosler 140 AccuBond
View attachment 533965

Does the program prevent you from adjusting muzzle velocity?



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[Member 5605]

Does the program prevent you from adjusting muzzle velocity?



P

I just used the defaults. Can adjust anything with this app down to spin drift and the earths rotation in relationship to your shooting angle.