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7.62x51(308) ballistics??

 
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  #1  
Old 06-30-2010, 12:27 PM
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Join Date: Dec 2009
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7.62x51(308) ballistics??

I picked up a few battlepacks of surplus ammo from Midway. I am not able to find any "real"ballistics info for this ammo. Ya I know it isnt all that accurate ect... However this is the ammo I am starting with (price was right).
Midway says its winchester but last time I checked they post info in English.
This is DAK ammo I am looking for any info reguarding ballistics. I have googled it 6 different ways from sundown and am haveing no luck...
I have seen it listed with a velocity of 2700-2800 (even saw 2750). It is berdan primed with a FMJ BT (cupronickle)brass cased. 147 grain.

I will be shooting this out of a remy 700 sps varmint 26 in brl bedded in a B/C medalist topped with a Burris 4-16 XTR. I do have a crony to use once at range but am lacking info such as bullet ce (Dm111)....

Any help will be greatly appreciated Thanks in advance...Dave
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Old 07-01-2010, 09:25 AM
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Posts: 192
Re: 7.62x51(308) ballistics??

Its easy. Shoot groups at two different ranges and measure the drop and use a BC calculator. Or if you have the ability to shoot at long ranges, just get zeros for your desired distances. Shooting over a chronograph is smart.
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Old 07-01-2010, 12:31 PM
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Re: 7.62x51(308) ballistics??

I have a few of the ballistics calcs from here and it asks for several factors I dont have ex: powder type?? and ammount?? bullet CE (not sure how much that matters??? Im guessing the more I leave blank the less effective my results will be.. From what I remember reading doesnt the bullet type determine the CE????(not affraid to learn something new). As for range I have from 50 yd to 200 yd. Say I got my groupings figured what to a do with those numbers. I have not learned how to figure the CE from those numbers?? The bullets are cupronickle FMJ BT DM111 147 gr.??

Is there a link I can go to to find this info???
Alot to learn...
Thanks Dave
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  #4  
Old 07-01-2010, 10:47 PM
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Re: 7.62x51(308) ballistics??

What is CE?
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  #5  
Old 07-02-2010, 07:35 AM
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Re: 7.62x51(308) ballistics??

Co-efficient Bullet shape and weight in reguards to trajectory (correct me if im wrong).
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  #6  
Old 07-02-2010, 09:11 AM
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Re: 7.62x51(308) ballistics??

I believe you are talking about Ballistic Coefficient, BC.
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  #7  
Old 07-02-2010, 12:27 PM
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Re: 7.62x51(308) ballistics??

Ok Ill go with that.... I have googled to the point of frustration trying to find any real info about this ammo....And not sure what to believe in some of the thread Ive read.... I totally realized this isnt good ammo but this is for practiceing trigger pulled breathing and practice at up to 200 yds for now.
I dont expect anything special other than it possibly holding 1 moa.
What will do is let me practice entering data into the ballistics software and other forms of practice. I do plan on getting better ammo for the more needed shots and for dialing in my skills....But at this point I find this ammo sufficient for my needs.


Thanks for the help!!! Dave
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