The World’s Largest List Of Airgun BCs Gets Bigger!
The World’s largest list of airgun BCs gets bigger!
HAM recently added more Ballistic Coefficients for .22 caliber caliber slugs. Together with an analysis of how the BC increases with weight.
Now there’s even more BCs added. These include some pellets and a new category: 25 cal slugs. Both H&N and ZAN slugs are featured in this new table.
That makes a total of no less than 161 individually-tested airgun ammo BCs in the HAM Ballistic Coefficients page. This represents a huge input of time and effort by the HAM Team of Doug Wall and Stephen Archer. It’s very gratifying to see that many serious airgunners from around the world have made this their “go to” source for airgun BCs – as the huge number of visitors proves.
All HAM BC data – for both pellets and slugs – is produced using the same FX Impact air rifle. This is intentional. It allows our results to be useful for the majority of shooters who want to compare how different ammo will behave in one specific air rifle.
As many know, airgun Ballistic Coefficients are a very complex subject. Pellet BCs vary significantly according to the type of pellet and the FPS at which the pellet is traveling. They are also effected by the airgun used to shoot them and many environmental factors.
Because the BC changes with the pellet’s velocity, there is actually no single Ballistic Coefficient for any airgun pellet!
And due to the variability inherent in each individual airgun pellet, the Ballistic Coefficient of two “identical” pellets can also be different!
In spite of all these issues, knowing a typical Ballistic Coefficient value for the pellets you are shooting is highly beneficial for calculating their trajectory. In conjunction with a Ballistic Calculator software program, BCs can be used to accurately estimate the amount of drop a pellet takes at different ranges. You need this for accurate shooting!
But note that Ballistic Coefficients are NOT, in themselves, a measure of accuracy. Two different pellets with the same BC can shoot with completely different accuracy in different airguns. Accuracy is a product of the gun, pellet, sighting system, ambient conditions . Not to mention shooter capability!
HAM’s Ballistic Coefficients are calculated from velocity measurements taken at the muzzle and at 30 Yards. Our test range is at 244 Feet above Sea Level and all testing is done on days when the temperature is between 75 and 85 Degrees F with Relative Humidity between 60 and 80% with minimal to no wind.
For HAM Ballistic Coefficients, we use the GA drag model for pellets. For slugs we use the G1 model.
Because of our structured testing, HAM BCs are comparable against each other. That can be an useful guide when you’re selecting which airgun ammo to choose for hunting or competition.
So yes, the World’s largest list of airgun BCs gets bigger! Again. Feel free to use it whenever you want…