calculating bc of a custom bullet?

BergerFan222

Active Member
Joined
Feb 24, 2015
Messages
38
Best to measure BCs. There are several methods. Try a google search for

how to measure ballistic coefficient of a bullet
 

Browninglover1

Well-Known Member
Joined
Jan 10, 2011
Messages
1,232
Location
Northern Utah
If you're designing them in a CAD program I imagine there's a way to do a fluid simulation that will help you determine BC. Another idea would be to get an accurate muzzle velocity using a Magnetospeed and adjust the BC in your ballistics program until it matches up to your real world drop (assuming you have any correction factors for your scope's turrets that need to be added).
 

BergerFan222

Active Member
Joined
Feb 24, 2015
Messages
38
If you're designing them in a CAD program I imagine there's a way to do a fluid simulation that will help you determine BC. Another idea would be to get an accurate muzzle velocity using a Magnetospeed and adjust the BC in your ballistics program until it matches up to your real world drop (assuming you have any correction factors for your scope's turrets that need to be added).

Manufacturers should not be using BC numbers inferred from drop. There are simply much more reliable methods to obtain accurate BCs.
 

Browninglover1

Well-Known Member
Joined
Jan 10, 2011
Messages
1,232
Location
Northern Utah
Manufacturers should not be using BC numbers inferred from drop. There are simply much more reliable methods to obtain accurate BCs.

He didn't say he was a bullet manufacturer he just stated they were working with some custom bullet ideas. Besides, most of the manufacturers BC's aren't accurate enough to trust without tweaking, so BC's should be taken with a grain of salt. Berger and Sierra seem to do a better job than most but even they require tweaking in many rifles to get your programs to give accurate drop predictions.
 

Primary

LRH Assistant
Here are some related products that LRH members are talking about. Clicking on a product will take you to LRH’s partner, Primary, where you can find links to LRH discussions about these products.

 
 
Top