Jeff Siewert

Like, hmm, okay.

So the length affects the rifling twist required for gyroscopic stability.

The longer bullets require faster twist.

In other words, lower number of inches per round, okay?

And the BC is really a measure of velocity.

Higher is better.

It also gives you less crosswind sense.

And it's proportional to the weight divided by the product of the drag ending, okay?

Yep.

I mean, for me, until like a year or two before my retirement, I never...

dealt with ballistic coefficients at all.

We talked drag coefficient.

Ballistic coefficient is kind of a, you could say, a contaminated term because the weight is the weight and area.

We tended to not deal with that.

Okay, why is ballistic coefficient important to rifle shooters?

Well, I've got three graphs here, velocity range, drop range, and crosswind drift versus range.

And you can see that with the 220 grain and the 178 grain, velocity retention is, you know, not identical, but fairly similar.

And with that flat point guy, you know what?

He loses velocity damn quick.

So, you know, just if you want good velocity retention, you've got to go with a high BC.