.40 caliber Black Bullets International BC estimates

I couldn’t find Ballistics Coefficients on the Black Bullets International web page so using data from my chronograph over the range of 0 to 25 yards I made some estimates for the .40 caliber 180 grain and 200 grain bullets.

I came up with 0.199 for the 180 grain bullet and 0.179 for the 200 grain bullet. Yes, the heavier bullet has a lower BC.

I’m a little skeptical of this although I suppose it could be possible. The two bullets look like this with the 180 grain bullet on the left.

image

The lube groove on the 200 grain bullet may increase the drag enough to account for the unexpectedly low BC.

Does anyone else have data that verifies or refutes my estimates?

5 thoughts on “.40 caliber Black Bullets International BC estimates

  1. Is that black powder coat on those bullets? My friend was using it on 300 blackout sub-sonics. Is it industry using it now?

    • Their website says, “BBI Premier Coated Bullets utilize J&M Specialty Products P/L HI-TEK Lube as our primary coating”. There are lots of companies shipping synthetic coated bullets now. For example, Federal, Blue Bullets, red bullets from Acme Bullets (love the wooden boxes they ship their bullets in), and you can pick your bullet colors (choose from 16 different colors!) from Eggleston Muntions.

  2. Looking at published BCs the numbers are sometimes counterintuitive.

    Now I’m curious; for what purpose do you want to know the BCs of pistol bullets? Are you using a PCC?

    • I didn’t look at published numbers. These numbers are from chronograph data I put into Modern Ballistics.

      Sometimes USPSA matches have stages with targets 50 or more yards away. The range I practice on is only 25 yards. I would like hold overs for out to 100 yards.

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