Who is your most trusted source for BC Data?

[Mr.Knowit all]

I would say Litz but it seems that even he was wrong on several rounds. My 30 cal 230s have been down graded and several others. I am not sure what happened... I assume he just found a better, more accurate way to test them. I mean all we are getting is just an average since the BC changes with speed. I don't think that there is one person or team more committed to this field of study than Litz and his team. JMO

 

[STOMP442]

Wrong may be the wrong word. I think why a few of the numbers have changed recently is that they have much more data to pull averages from. It's my understanding that Litz and crew are continuously testing and updating info as needed. This is why you see some bump down and others bump up a bit like the 25 cal 115 VLD. That being said is why I trust and use his data. Like you said I don't think there is anyone else out there as dedicated to the science as well as the real world applications as Bryan Litz.

 

[DocUSMCRetired]

Wrong may be the wrong word. I think why a few of the numbers have changed recently is that they have much more data to pull averages from. It's my understanding that Litz and crew are continuously testing and updating info as needed. This is why you see some bump down and others bump up a bit like the 25 cal 115 VLD. That being said is why I trust and use his data. Like you said I don't think there is anyone else out there as dedicated to the science as well as the real world applications as Bryan Litz.

This is correct, they are continuously tested and retested. The BCs were not wrong, they were updated. Along with other manufacturers as well. This is why we publish the lot numbers in the book. So you can see about how near or far you are from that testing.

 

[rebel]

This is correct, they are continuously tested and retested. The BCs were not wrong, they were updated. Along with other manufacturers as well. This is why we publish the lot numbers in the book. So you can see about how near or far you are from that testing.

Doc, I may use other bullets than Bergers from time to time, but I trust y'alls stuff. You also seem to test many bullets along side Bergers which is the way I would run a test. My formulas tend to read finger, trigger, breath, shoot. So I can appreciate what Litz and company have done for the shooting world. I've studied Newberry and various others.
I to don't do face book so count this as "You guys" I also find the doppler stuff Hornady is doing interesting, though don't know enough about it to say it's definitive.

 

[DocUSMCRetired]

Doc, I may use other bullets than Bergers from time to time, but I trust y'alls stuff. You also seem to test many bullets along side Bergers which is the way I would run a test. My formulas tend to read finger, trigger, breath, shoot. So I can appreciate what Litz and company have done for the shooting world. I've studied Newberry and various others.
I to don't do face book so count this as "You guys" I also find the doppler stuff Hornady is doing interesting, though don't know enough about it to say it's definitive.

I appreciate the feedback. I am going to do another poll on our website in the future. One that is more open to all users, this was a quick data gathering for SHOT Show this year. Next year, I will strive to do better and be more inclusive.

 

[Mr.Knowit all]

There are some VERY fragile egos on here. If someone designs bullets and gives it a particular BC then a couple years later decides to change it (because recent data collected) and/or lower it then they posted the wrong BC. Mr. Litz has done more IMO for long distance shooting and ELR shooting than anyone else. I have met him at SHOT a few years ago, had him sign my books. He and his crew are clearly serious about what they do. The fact that he had the integrity to change BCs on some of the bullets even he designed speaks volumes about him. I understand that BCs are just an average because the BC changes with speed so I never thought it was a big deal. Maybe bullets should be posted with wider average? For example: if a bullets has a G1 BC of .691 maybe it should post .671-.691? Or have fps and tof BCs? I don't know... I am still learning, always will be... JMO. Not trying upset anyone.

 

[DocUSMCRetired]

BCs are changed, because tooling changes. Dies wear out etc. This applies to all manufacturers, but the BC can change a certain percentage from lot to lot. It might not, and it might. A lot of effort is taken by some companies to try to make sure repeatability, but its tough. Because of this, the BCs must be updated from time to time. While it is the "same bullet" it is not actually exactly the same. The reason the BCs change is not due to the methods used for testing. This is why you have bullet lot numbers, powder lot numbers, primer lot numbers etc. So you can track these things and put a number on that specific lot.

 

[geo.ulrich]

tried the poll but don't do f.b. so my answer is send out for Doppler