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Ballistic Calculator instead of Chronograph

 
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  #1  
Old 07-05-2011, 10:24 PM
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Ballistic Calculator instead of Chronograph

Chronograph is a tool anyone working on load development should use, but what if you sighted in @ 100 then fire a group @ 300 and measure bullet drop, knowing bullet drop you can plug data in ballistic calculator and work your muzzle speed till you get same drop. Pocket ballistic calculator reduces stuff you need to carry on your range trip, then get everything setup and try not to loose or break things.
What do you think?
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Old 07-05-2011, 11:33 PM
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Re: Ballistic Calculator instead of Chronograph

I guess that would work... but I use my chronograph to see my ES; that's the only reason I bought it, that is really the only reason I'll use it.

It is nice to know the exactly speed of my load, but since I am going to find the actual POIs for the distances I shoot at; I only need the estimation from my loading manual.
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Old 07-06-2011, 06:54 AM
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Re: Ballistic Calculator instead of Chronograph

I have been playing around with this and found that it can be very accurate. The longer the range, the more closely the velocities match. I tried it using impact info at 200, 300, and 500 yards using Ballistic FTE on my I Phone then took the data from my Chrony. Velocities were within 25 FPS. Can't get spread data without the chronograph but group size should correlate and that's really what I'm concerned with.I expect though you could see less similarity with different barrels. With all that I'd still check my impact point at the max range I shoot.
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Old 07-06-2011, 08:03 AM
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Re: Ballistic Calculator instead of Chronograph

Jinx, everyone has to validate distant target results.
But using this info to estimate MV is the least accurate approach.

The chrono provides MV, and distant target drops provide BC adjustment.
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Old 07-06-2011, 08:04 AM
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Re: Ballistic Calculator instead of Chronograph

Quote:
Originally Posted by Jinx-) View Post
Chronograph is a tool anyone working on load development should use, but what if you sighted in @ 100 then fire a group @ 300 and measure bullet drop, knowing bullet drop you can plug data in ballistic calculator and work your muzzle speed till you get same drop. Pocket ballistic calculator reduces stuff you need to carry on your range trip, then get everything setup and try not to loose or break things.
What do you think?

It will get you close but will not be exact.

One is actual, and the other is calculated and there is the difference.

The best way(Most accurate) is to chronograph at the muzzle and at 100,200 and 300yards.

At this point you have a very good idea of the Actual BC of the bullet And the velocity at those
distances.

From there the Calculated velocities will be very close at longer distances.

The chronograph also gives lots of other data that the ballistic calculator cannot, so one can't
replace the other.

It is an amazing tool but you still need a chronograph in my opinion.

J E CUSTOM
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Old 07-06-2011, 09:04 AM
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Re: Ballistic Calculator instead of Chronograph

" The chronograph also gives lots of other data that the ballistic calculator cannot, so one can't replace the other. "

I see thanks, I guess I would have to carry both
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Old 07-06-2011, 06:02 PM
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Re: Ballistic Calculator instead of Chronograph

Quote:
Originally Posted by Jinx-) View Post
" The chronograph also gives lots of other data that the ballistic calculator cannot, so one can't replace the other. "

I see thanks, I guess I would have to carry both

Now that's is funny .

I hadn't though about carrying a chroney hunting.

It will prepare you for that once in a lifetime shot though,before it presents it's self.

What is the saying ? trash in trash out. I like the one that go's Good data in good data out.

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