Bullet drop from 1873 Win.

[griswold]

Does anyone have a breakdown of the average bullet drop from a 20" and 24" 73 Win?
I understand there will many variations for each rifle, I just want to know the average drop.

Assuming the velocity at 1300'/sec. from muzzle; 205 grain and 215 grain lead bullets.

Drop in inches at 200 yds" avg when zeroed at 100 yds.?

How high in inches above zero at 100 yds to get zero drop at 200 yards?

Drop in inches at 300 yds. avg. when zeroed at 200 yds.?

How high in inches above zero at 200 yds to get zero drop at 300 yrds avg."

Thanks in advance
Griswold

[El Tio Loco]

At 1,300 fps with a 205 grain lyman bullet with a ballistic coefficient of .123:

With 100 yard zero
@100 yards-   -0-
@200 yards   -32.5 "
@ 300 yards  -114.5"

With 200 yard zero
@100 yards   +16.3"
@200 yards  -0-
@300 yards  -61.2"

With 300 yard zero
@100 yards +36.8"
@200 yards  +41"
@300 yards  -0-

For 215 grain swc with a b/c of .111 @ 1,300 fps
With 100 yard zero
@100 yard -0-
@200 yard -33.7"
@300 yard -114.9

With 200 yard zero
@100 yard +16.9"
@200 yard -0-
@300 yard -64.2"

With 300 yard zero
@100 yard +38.4"
@200 yard +43"
@300 yard -0-

Hope this helps, 

Ken

[Sir Charles deMouton-Black]

I think you might be able to work it out from here;

http://www.handloads.com/calc/index.html

[griswold]

Thanks Gents.................

[wyldwylliam]

Sir Charles, that calculator is a real gem, hugemongous thanks for that!

[Sir Charles deMouton-Black]

Sir Charles, that calculator is a real gem, hugemongous thanks for that!

The HORNADY ballistic calculator is supposed to work a lot better at longer ranges, but you'd have to go elsewhere to calculate ballistic cooeficient.  The handload.com program has a quick bc calculator in a sidebar to the left.  The ballistic calculations are reasonably accurate for ranges up to 3 - 4 hundred yards.

http://m.hornady.com/ballistics-resource/ballistics-calculator

http://tmtpages.com/calcbc/calcbc.htm