New Ballistic Coefficients For JSB Slugs, Hades Pellets And More…
HAM is adding more entries to the world’s largest online database of Ballistic Coefficients. This time we have new Ballistic Coefficients for JSB slugs, Hades pellets and more!
Full details are now added into the HAM BCs page. But here’s a summary of some of the new data.
Ballistic Coefficients For JSB Slugs And Pellets:
Let’s start with the latest HAM test data for JSB slugs. For JSB Knock Out slugs we have the following BCs:
.177 cal 13.43 Grain Knock Out BC = 0.066
(This compares to the BC of 0.085 for 25.39 Grain .22 cal Knock Outs)
For JSB Hades pellets:
.22 cal 15.89 Grain Hades BC = 0.023
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JSB Match Diabolo Hades .22 Cal, 15.89 Grain, Hollowpoint, 500 Count 0.22
But wait, there’s more…
Daystate Howler Slugs:
We found very similar values for Howler slugs in both .177 and .22 calibers.
20.3 Grain .22 caliber Daystate Howler Slugs BC = 0.060
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Olympia Match Pellets:
We tested two types of these Polish-manufactured pellets, as follows:
.177 cal 9.41 Grain Olympia Pointed Heavy Pellets BC = 0.015
.177 cal 8.26 Grain Olympia Match Heavy Wadcutters BC = 0.012
SIG Venom Pellets:
.22 caliber 14.5 Grain Pellets BC = 0.018
Norma airgun pellets are new into the market. Here’s the HAM BC test results for them:
.177 cal 8.2 Grain Norma S-TARGET MATCH Pellets BC = 0.012
.177 cal 8.2 Grain Norma SUPERPOINT STRIKE BC = 0.013
.177 cal 8.4 Grain Norma GOLDEN TROPHY FT BC = 0.015
.177 cal 9.1 Grain Norma GOLDEN TROPHY FT Heavy BC = 0.020
.22 cal 14.0 Grain Norma S-TARGET MATCH Pellets BC = 0.012
.22 cal 14.5 Grain Norma SUPERPOINT STRIKE BC = 0.014
.22 cal 15.9 Grain Norma GOLDEN TROPHY FT BC = 0.019
.22 cal 17.6 Grain Norma GOLDEN TROPHY FT Heavy BC = 0.02
As always, it’s important to remember that due to our structured testing, HAM BCs are comparable against each other. That can be useful when you’re selecting which pellets to choose for hunting or competition.
Also please note that you may find the Ballistic Coefficients listed here differ slightly from those you may have seen published elsewhere. This does not mean that either number is necessarily incorrect. It probably just means that the same pellets have been tested with different air rifles at different muzzle velocities and in different ways.
You can read more details about how HAM determines it’s typical airgun Ballistic Coefficient values elsewhere in our magazine. But the keys to our reliable, accurate BCs are consistent, comparable test methodology and high quality equipment.
For this reason, all HAM airgun Ballistic Coefficient testing has been undertaken by the same experienced, dedicated testers, using the same FX Impact air rifle, set to full power, with all FPS measurements recorded using the same Labradar Doppler Radar system.
HAM Ballistic Coefficients are generated by shooting a sample of 10 un-selected pellets straight from the tin. This is done to represent use by the average shooter. For this reason, and because these BCs were prepared by experimental testing, the BCs you achieve may be sightly different. “Your mileage may vary”.
HAM is very transparent about how our Ballistic Coefficients were generated. Where BC figures published elsewhere differ from ours, make sure to understand the testing used to generate them.
HAM BCs are calculated using the GA drag model for pellets. For slugs we use the G1 model. Slug BCs are a hot topic right now and you can read some of the latest technical thinking in this recent post by HAM Technical Editor Bob Sterne.