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What is the real BC of the 240MK?

 
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  #1  
Old 11-06-2005, 01:59 AM
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What is the real BC of the 240MK?

I was trying out my new barrel today and I'd like to know if anyone else has found the BC of .711 for the 240MK to be a bit too low?

Thanks,
Shummy
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  #2  
Old 11-06-2005, 08:28 AM
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Re: What is the real BC of the 240MK?

Shum -- DC found the same thing! BTW -- check out my sigline...DC hangs out there and can give you the number he found when he gets back from killin stuff in CO [img]/ubbthreads/images/graemlins/laugh.gif[/img]

JB
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  #3  
Old 11-06-2005, 12:00 PM
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Re: What is the real BC of the 240MK?

I recently measured it (velocity drop over 200 yds, corrected for conditions) at .635 from a 1:10 twist at a relatively low velocity (2850). I'm hopeful it'll measure a good shot higher when I re-measure from my 1:9 twist at a higher velocity (when I get my new barrel installed).
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Old 11-07-2005, 12:11 AM
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Re: What is the real BC of the 240MK?

My bad I found the error. I made a last minute 2 click zero adjustment and set my turret before going out to 400....adjusted the wrong way! Result was 1 moa that I couldn't crunch numbers for nohow. For a day I had a 3 MOA to 400 gun. Rechecked at 100 today and now its just a plain old 4 to 400 [img]/ubbthreads/images/graemlins/grin.gif[/img] 3150 to 3200 is where it likes it so far. (Chrony numbers) The .711 should get me in the ballpark. Will know more when I go on out farther. Was going to test 800 and 1100 today but a big storm came in.

Thanks for the info guys and I'll let you know what I figure out once I get a few more drop points and access to a 43.

JB you going to the shoot Sunday?
Shummy
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  #5  
Old 11-07-2005, 08:52 AM
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Re: What is the real BC of the 240MK?

[ QUOTE ]
3150 to 3200 is where it likes it so far.

[/ QUOTE ]

What are you shooting it in to get those velocities?
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  #6  
Old 11-07-2005, 11:35 PM
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Re: What is the real BC of the 240MK?

Hi Bill,
29 inch 30-378, throated so the boattail junction is just above the neck/shoulder, crammed .005, H50BMG 107.5 3130, 109.5 3170, 111 3220 (slight marks) Marks aren't as bad as some factory ammo I shot when it was a regular Accumark. Retumbo starts showing marks at 103 3185.

I had just enough time to launch 3 of the H50 107.5's (3130) at 500 tonight. Had some mirage (riverbottom flat) but I usually do not get much wind affect vertical here. Although I was seeing at least an inch vertical jump of the bull due to the mirage, I was pleasently surprised with a 1.8 inch three shot, one of which was a fouled/cold bore. Scope was doped for 6.5 MOA and POI center was 1 1/4 inch high, 2 inches left. I did see the left push too but held center to see how much these big bullets would push.

Needless to say I'm quite pleased with this inherently inaccurate Weatherby.
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  #7  
Old 11-08-2005, 08:31 AM
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Re: What is the real BC of the 240MK?

Shummy

Is this gun on a Wby Mark V action?
What make of barrel?
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