Am I to assume that these BC values don't apply when these pellets are shot from my Gamo Swarm with 100-150 less fps velocity ?
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AGN is proud to share HAM's BC database
- Thread starter Michael
- Start date
I think it will be slightly less, since BC rises pretty drastically towards the speed of sound (and for diabolos it will practically crash after that.)
So expect to round off maybe 10-15%.
Remember that the most accurate projectile should be used and be BC considered. So the list is a good place to look for candidates.
Anyways, everyone will have to verify the BC for actual sharp shooting.
So expect to round off maybe 10-15%.
Remember that the most accurate projectile should be used and be BC considered. So the list is a good place to look for candidates.
Anyways, everyone will have to verify the BC for actual sharp shooting.
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Thank you HAM for your hard work in formulating and sharing the table. It is really appreciated.
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There is a partial answer in this post by Yrrah comparing BSA barrel with ST:
Heavy and light JSB .25 cal pellets comparative ballistic drag coefficients.[/QUOTE]https://www.airgunnation.com/topic/...c-drag-coefficients/embed/#?secret=DgBjxsP48P
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Awesome to have all this information in one spot. It will definitely come in handy in the future and save us a lot of time figuring this stuff out for ourselves. Thank you!
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But wait, there's more!
We have just added another batch of Ballistic Coefficients to the Hard Air Magazine database - mainly for H&N and Crosman pellets. Again, all are produced according to the same test protocol and, thus, are directly comparable to the existing data.
Now, the HAM BC database contains a total of 111 Ballistic Coefficients:
- 49 BCs for .177 cal pellets
- 52 BCs for .22 cal pellets
- 8 BCs for .25 cal pellets
- 2 BCs for .30 cal pellets
I'm glad to see that this data is proving useful and hope that the additional pellet BCs will be useful to serious airgunners everywhere
Stephen Archer
Hard Air Magazine
https://www.hardairmagazine.com
We have just added another batch of Ballistic Coefficients to the Hard Air Magazine database - mainly for H&N and Crosman pellets. Again, all are produced according to the same test protocol and, thus, are directly comparable to the existing data.
Now, the HAM BC database contains a total of 111 Ballistic Coefficients:
- 49 BCs for .177 cal pellets
- 52 BCs for .22 cal pellets
- 8 BCs for .25 cal pellets
- 2 BCs for .30 cal pellets
I'm glad to see that this data is proving useful and hope that the additional pellet BCs will be useful to serious airgunners everywhere
Stephen Archer
Hard Air Magazine
https://www.hardairmagazine.com
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I share similar thoughts as SMH77 about barrel configuration influence. But I sincerely appreciate the compilation and I’ll wait to run some of my own tests on my rifle for comparison. Thanks again that was The BallistoWiki if I ever saw one.
George
George
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Hi everyone, I share this video if you want to use it to calculate BC, in this case I could get an approximate value of the coefficients for slugs of 35 grains and the Gamo TS 22, which I did not find anywhere. The video is in Spanish but Subtitles can be used:
https://www.youtube.com/watch?v=fkuTddj8a8c
https://www.youtube.com/watch?v=fkuTddj8a8c
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