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revolutions per minute debate

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Unread 04-24-2005, 07:24 PM
Platinum Member
Join Date: Jun 2001
Location: Potomac River
Posts: 5,070
Re: revolutions per minute debate

Now then let us shoot a 300 Wthby mag a while

We will shoot a Sierra Matchking 180 gr with a BC of 0.640 and a Sierra 180 gr round nose with aBC of 0.250

We will shoot these bullets at 3000 fps through a 1 in 8 twist barrel at 4500 revs per sec

SMk.....100yd...200yd...300yd...400yd...500yd...60 0yd...1000
Vel.....2826....2660....2497....2340....2188....20 42....1518
R/ft....1.59....1.69.....1.80.....1.92.....2.06..... 2.20.....2.94

Vel.....2623....2292....1986....1680....1497....11 14....796
R/ft....1.71.....1.96....2.2.....2.28.....3.00....4. 04.....5.56

What we see here when we hold everything constant except the BC and vary the BC the two bullets do not ever have the same RFD

Let us hope it doesn't rain tomorrow because I'm going turkey hunting come H'll or high water. you will notice that I did not commit to killing one.
The Smokin Fur Rifle Club
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Unread 04-24-2005, 07:47 PM
Platinum Member
Join Date: Sep 2004
Location: on the rifle range in Utah
Posts: 2,704
Re: revolutions per minute debate

GG, just because your right doesn't mean your pals will accept it. Do you feel you have adequate evidence?

[/ QUOTE ]

Yes. I have printed off a copy of this topic and will show it to those who are interested at the next match.
Find it
Range it
Click it
Pull it
Dump it

If it's not far, it's boring.
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