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drop chart and chronograph drop chart

 
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  #8  
Old 10-22-2011, 06:58 AM
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Re: drop chart and chronograph drop chart

I get a BC of .890 then for my chart..does that seem typical? 300 rum - berger 210 vld
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  #9  
Old 10-22-2011, 07:27 AM
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Re: drop chart and chronograph drop chart

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Originally Posted by sdriverbottom View Post
I get a BC of .890 then for my chart..does that seem typical? 300 rum - berger 210 vld
I don't think so. My guess would be your sight height, zero or one of your other inputs is way off.

I'm not an expert here but that simply seems impossible with a bullet that size.

Check all of your inputs.
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  #10  
Old 10-22-2011, 08:26 AM
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Re: drop chart and chronograph drop chart

I'm having a hard time figuring what my problem is..zero is good at 100, i've checked that many times..sight height is 1.85..chrono was reading 3023 with hsm 210 gr vld..also a few drops are 450 yds - 5.8moa (clicked to to 6 moa shot was good) 500 yds - 7moa, 700 yds - 12 moa...all theses shot hit a 6 inch gong..I would just like things to match up a little better..Thanks guys!
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  #11  
Old 10-22-2011, 03:45 PM
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Re: drop chart and chronograph drop chart

Quote:
Originally Posted by sdriverbottom View Post
I'm having a hard time figuring what my problem is..zero is good at 100, i've checked that many times..sight height is 1.85..chrono was reading 3023 with hsm 210 gr vld..also a few drops are 450 yds - 5.8moa (clicked to to 6 moa shot was good) 500 yds - 7moa, 700 yds - 12 moa...all theses shot hit a 6 inch gong..I would just like things to match up a little better..Thanks guys!
I was thinking about this while I was out working and doing a little predator control.... .

I'm wondering if your chrony isn't off... .

Give me the caliber and load you are using let me play with it...

I'm thinking possibly you are off a hundred fps or so on your MV.
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  #12  
Old 10-22-2011, 04:24 PM
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Re: drop chart and chronograph drop chart

What program are you using? Verified scope adjustments?
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  #13  
Old 10-22-2011, 08:24 PM
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Re: drop chart and chronograph drop chart

I went thru that crap also with my edge. Chrono says 2750 but i tweeked mv to 2860 and chart works good out to 1220. i believe the chart and would like to trash the chrono.
mike
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  #14  
Old 10-23-2011, 08:29 AM
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Re: drop chart and chronograph drop chart

+1 for Mike33
If you have 5 different Chronographs you're going to have 5 different readings even if you shoot through all 5 with the same bullet.
I went through the time and wasted money to figure this out. What matters is where the bullet actually hits. I wouldn't even mess around with the MV and just do like someone suggested and shoot at different ranges, mark your MOA's and go to work on your pc.
I'd suggest keeping with the b.c and adjust the MV to accommodate your hits, after all it's not about speed. I've found this to be a fail proof system even if the MV may sound a little off. Most guys like to publish the velocity for bragging purposes but that doesn't bother me one bit.
I just happen to use the Berger 210 in my RUM and when I tested the points of impact at various ranges, my Exbal software showed my velocity at 3090 fps, my Chrony was 85 fps off. Which do you think I'll follow?
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