Why do solids have lower bc’s ?

[nealm66]

Why do solids have less bc's than same weight jacketed bullets? Google says its sectional density but I don't understand how a longer bullet requiring more twist would not be better. Isn't it more about the shape than the density? Is there a point where they intersect and density trumps shape?

 

[redneckbmxer24]

The relief rings create drag. The same bullet without them would have a higher BC. Hornady has a good podcast that talks about it with their CX bullets. They played with ring profiles in order to achieve a higher BC with them than is typical.

 

[nealm66]

Ok, why do they need the relief rings vs the jacketed?

 

[redneckbmxer24]

Listen to the podcast, it's educational.

 

[huntinghuasna]

Listen to the podcast, it's educational.

Great podcast, thank you.

 

[nealm66]

Yes, sorry, I forgot to thank you. As I was watching it I realized I had read this before and had just forgotten.