Hornady BCs

[Turbulent Turtle]

Right. And for some of them (at least- I haven’t looked at them all) they list multiple BCs for one drag function, which is the confusing part.

Yeah. The way I see it, they are making the effort to properly list their more recent offerings and not taking the time to update the older stuff. Up to now. Who knows if that changes in the future?

 

[dcali]

This is what I’m talking about: https://www.hornady.com/support/ballistic-coefficient

Why they feel the need to complicate things with multiple BCs is not clear to me, and their explanation is not very convincing. It’s confusing for no good reason.

 

[Longrange57]

This is what I’m talking about: https://www.hornady.com/support/ballistic-coefficient

Why they feel the need to complicate things with multiple BCs is not clear to me, and their explanation is not very convincing. It’s confusing for no good reason.

Damoncali, I agree with your assessment. Although I have had excellent results with the major manufacturer bullets, I'm not fond of the confusion either. After shooting the bullets I have in the spread sheet and observing come-ups. I could be wrong....and again, only my observations with my equipment, I have often increased the Berger values by around 5% and come out a lot closer. I think Berger is slightly conservative in my opinion. They probably do this on purpose and not overshoot the mark as maybe others do.
So far as Hornady goes, I do not shoot super fast barrel twist! Hornady's values may be right in certain situations, but I use their lower end values which fall fairly close to Berger if we increase Berger by 5%. I'm not speaking for Berger or Hornady but due to observation, one company is conservative and the other not necessarily optimistic but maybe correct if you keep the bullet at high velocity in a very fast twist rate.
I don't have it figured out by no means! I certainly wish we had a better way of comparing as well without some of the confusion.

 

[davidjoe]

Take 180 7mm for example. Red Blue Green and Yellow all make a bullet most closely resembling the boat tail G7 projectile. For Fclass shooting, we would hope the published BC data provide at least loose initial guidance on how each of these would drop, and drift in the wind - if all were fired at exactly the same velocity and all close to their respective ideal spin rate. Just for myself, at 1,000 I’m not seeing the drift and drop of a groups of the most ambitious BC claims bear out. The Scenar for example doesn’t drop anywhere close to as much as I’d predict. The red bullet doesn’t strike higher or drift less at long range and beyond.

 

[Longrange57]

Take 180 7mm for example. Red Blue Green and Yellow all make a bullet most closely resembling the boat tail G7 projectile. For Fclass shooting, we would hope the published BC data provide at least loose initial guidance on how each of these would drop, and drift in the wind - if all were fired at exactly the same velocity and all close to their respective ideal spin rate. Just for myself, at 1,000 I’m not seeing the drift and drop of a groups of the most ambitious BC claims bear out. The Scenar for example doesn’t drop anywhere close to as much as I’d predict. The red bullet doesn’t strike higher or drift less at long range and beyond.

Yes sir, I follow you. In my case, the red bullet as a 5 shot group at 530 yards does strike slightly higher than yellow, but may not be the case with different twist. I often use both G7 and G1 , and have not seen much difference in what the program says, but always see a difference in where bullet strikes.

 

[Turbulent Turtle]

This is what I’m talking about: https://www.hornady.com/support/ballistic-coefficient

Why they feel the need to complicate things with multiple BCs is not clear to me, and their explanation is not very convincing. It’s confusing for no good reason.

Sorry for the delay in answering; life happens.

I see what you are saying. I won't even attempt to explain anything; it's the way Hornady does things and it's their call.

I do like they are trying to provide more information and insight into their products, and that helps the folks who really want to get into the nitty-gritty of things.

I believe I am close to solving my issues with the new-to-me bullet I am now using and I am applying their numbers to my ballistics calculations and they seem to be very realistic as observed in recent matches.

Certainly, the extra wind "resistance" of that bullet allowed me to survive the nasty wind switches at the most recent match and actually score near the top and actually carry the 3rd match. I discovered that it takes time to get familiar with a bullet after shooting multiple thousands of another bullet for several years. I think I'm beginning to see the benefits of the bullet, but more work remains. So any info from Hornady is good to have.