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Reloading Techniques For Reloading


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Richards B.C

 
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  #1  
Old 07-02-2005, 10:01 PM
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Richards B.C

How to you find out the BC on his bullets?
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  #2  
Old 07-03-2005, 12:45 AM
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Re: Richards B.C

Richard stopped offering predicted BC values for his bullets because awhile back there were some that basically called BS on these predictions.

These predictions were actually offered by the die makers and Richard was only passing on this information in good faith and always listing them as predicted BC values.

Because of that mess, Richard now lets us test them and figure out the BC values for ourself which in fact is the only real accurate way to do this anyway.

Many will say this is to simplistic to be accurate but I simply use the known velocity of the load I am using and measure bullet drop at several different ranges. For moderate range usage I will get test drop data at 100, 300, 500 and 800 yards. For extreme range usage, I will get 500, 800, 1000 and 1300 yards if possible.

Then I take this information and plug it into a ballistic program until the computer model matches the actual bullet trajectory but tweaking the BC value.

While this may not be scientific enough for may, it gets me on small targets out to the one mile range very regularly so I will stick with the system.

The only accurate way to get a certain bullets BC is to shoot them at the ranges you will be using them and see what they do.

I will say I have yet to shoot a Wildcat bullet that did not produce a higher BC then any of the Sierra MK bullets and at times dramatically higher.

What bullets are you interested in, I have tested several of his bullets and would give what data I have if it is what your looking for.

Kirby Allen(50)
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Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
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  #3  
Old 07-03-2005, 07:26 AM
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Re: Richards B.C

Thanks kirby.
Kirby can i get some info on your .270 Allen Mag.
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  #4  
Old 07-03-2005, 05:53 PM
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Re: Richards B.C

Skeeter,

Here is a quick low down of the 270 Allen Mag. It is based on the full length 7mm RUM case with shoulder angle increased and body taper reduced to the Allen Magnum configuration.

It was designed around the Rem 700 receiver and for use in 28-30" barrels of #5 to #7 contour for use on rifles that weigh in at 8.5 to 12 lbs and intended for serious deer and pronghorn hunting at extended ranges. Inital goals were to provide legit 600 yard performance but from the results we are getting, this round is an honest +1000 yard deer round.

Performance wise, in a 30" pipe, your looking at a 130 gr bullet at 3850 fps, a 140 gr bullet at +3700 fps and best of the lot, the 169.5 gr ULD RBBT with its .750 BC right at 3400 fps with top loads.

Recoil in my Extreme Sporters fitted with a Holland QD brake is about like a sporter weight 22-250 or 243 chambered rifle.

With a solid shooting position, you can see every bullet land at any range.

Dies are kept in stock to ship with rifles as are the Wildcat ULD RBBT bullets.
Good Shooting!!

Kirby Allen(50)
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Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
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  #5  
Old 07-03-2005, 10:17 PM
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Join Date: Feb 2005
Posts: 23
Re: Richards B.C

150-169-180-190 and the 200 gr. bonded .308s
225-250-275 and the 300 gr. bonded .338s

I thank you, and my information starved ballistic software thanks you.
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  #6  
Old 07-06-2005, 08:05 AM
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Join Date: Oct 2004
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Re: Richards B.C

HI kirby, I don´t know what kind of facilities and equipoment you have, but do you have any measured - even aproximately- BC for the 6,5 wildcat bullets-?
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  #7  
Old 07-06-2005, 08:10 AM
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Join Date: Oct 2004
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Re: Richards B.C

another thing, do you think testing with two crono´s would give accurate info for calculating BC based on velocity?
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