Ballistic Coefficient of 200 grain 30 caliber bullets

[fatback]

I know this ammo is no longer manufactured but I have a good stash of Federal Premium 200 grain TBBC for my 300-win mag. I wanted to order a custom turret for my Leupold scope that is on the rifle. I know one of the pieces of info they need is the BC of the bullet. This info is not on the box, and I have not been able to find it with an internet search and a call to Federal. Does anybody know the Ballistic Coefficient of a 200 grain .308 caliber bullet? Any help would be appreciated. Thanks

 

[menhadenman]

See if this makes sense. I’d get @Jester896 or @BriarPatch99 opinions also. I feel like federal uses Speer bullets but not sure. Also BC is going to be influenced by velocity.

 

[menhadenman]

Bison Ballistics has good info online also.

 

[fatback]

The velocity is listed at 2700 feet per second. Ill check out Bison Ballistics. Thanks

 

[Jester896]

Does Speer still make Trophy Boned Bear Claws any more in the lighter weight bullets?

the answer is .395 according to some of the old Federal load information I have from 2013

 

[JustUs4All]

Velocity doesn't really have anything to do with the ballistic coefficient, it's a function of shape and mass.

 

[bighonkinjeep]

Velocity doesn't really have anything to do with the ballistic coefficient, it's a function of shape and mass.

Here ya go,
BC changes with velocity. More speed.= higher BC
Lower speed= lower BC

Ballistic Coefficient - Hornady Manufacturing, Inc

A-Tip®, ELD® Match, and ELD-X® Ballistic Coefficient Values Hornady originally published “800 yard”* average Ballistic Coefficient (BC) values for ELD-X and ELD Match bullets. This was done to provide the most usable BC from a trajectory prediction st...

www.hornady.com

 

[menhadenman]

Here ya go,
BC changes with velocity. More speed.= higher BC
Lower speed= lower BC

Ballistic Coefficient - Hornady Manufacturing, Inc

A-Tip®, ELD® Match, and ELD-X® Ballistic Coefficient Values Hornady originally published “800 yard”* average Ballistic Coefficient (BC) values for ELD-X and ELD Match bullets. This was done to provide the most usable BC from a trajectory prediction st...

www.hornady.com

Bingo - some manufacturers use an average velocity for G1. Can’t recall the specifics but it’s something like 2600-2900 fps for a .264.

 

[JustUs4All]

Gold star to y'all, @bighonkinjeep and @menhadenman. Although it is counterintuitive to me, y'all are correct and I am ... I am ... I am ... that word that the Fonz had so much trouble with. LOL

 

[menhadenman]

Gold star to y'all, @bighonkinjeep and @menhadenman. Although it is counterintuitive to me, y'all are correct and I am ... I am ... I am ... that word that the Fonz had so much trouble with. LOL

Don’t worry pal, I always tell folks that even a broken clock is right twice a day! Normally I’m the one that’s off

 

[Jester896]

your not 100% wrong either...velocity just plays a part in it

 

[menhadenman]

You can also “true up” you info before sending it off. There are several apps that do that sort of thing. Shoot at 50, 100, 150, 200, 300 (for example) and see how the trajectory lines up. You’d hate to get a dial that’s slightly off.

 

[menhadenman]

A couple sites that have been useful in my learning.

JBM - Calculations

www.jbmballistics.com

Exterior Ballistics Calculator

A free ballistics calculator for long range shooting.

bisonballistics.com

 

[fatback]

Appreciate the help gentlemen. I’ll get some longer range shooting done here in the next week or 2 and get one ordered.

 

[Liberty]

Appreciate the help gentlemen. I’ll get some longer range shooting done here in the next week or 2 and get one ordered.

Temperature also makes a difference, especially when you stretch things out. I like to get my baseline dope when it’s not freezing cold or blazing hot if possible.