| Determining the BC of a bullet? |  |  | |
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Posted by: Nick B 02/21/2002, 01:07:05 |
I plan on purchasing a box or two of the JRP bullets I mentioned below, and was wondering what information I need to calculate their BC. I have a chronograph, so I can measure muzzle velocity and 100-yd velocity. The weight is known (25 gr), so what else is needed? Is there any online calculator that I could punch these figures into? Thanks. |
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| Re: Determining the BC of a bullet? -- Nick B | Top of thread | Archive | |
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Posted by: Rich in VA ® 02/21/2002, 05:08:14 Author Profile |
Yes, you can do it this way, altho' two chronos would give you more accurate readings. With two chronos, just take the two readings, plug them into the program. With a one-chrono set up, I would shoot about 5-10 rounds at the muzzle and get an average. Then move the chrono to 100 and get another average. Then, plug both numbers into the program and calculate. One program that does this is PointBlank, available free at www.huntingnut.com Also, Bill Frenchu's excellent program, available as shareware at http://ourworld.compuserve.com/homepages/wrf/shoot.htm#prog I use both at times, just as a check against each other. Hope this helps. Rich |
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