Guess That Bc

[charger 1]

.460, 460 grs with check,1.073" long,.320"frontal..I'm thinkin in the low .200 bc's. Any thoughts

[JDL]

Try: www.uslink.net/~tom1calcbc/calcbc.htm -JDL

[Ranch Dog]

.460, 460 grs with check,1.073" long,.320"frontal..I'm thinkin in the low .200 bc's. Any thoughts

I have the "projected" BC on my laptop but won't be able to get to it until this afternoon.

[w30wcf]

charger 1,
I'm thinking about .30 B.C. Lyman's 457193 (Original .45-70 Marlin bullet) is listed at .307 @ 420 grs. but has a smaller .28"meplat (bullets fom my mold).

Your bullet is 10% heavier with a slightly bigger front end. I'm thinking the extra weight will equalize the larger meplat, at least at velocities below 1,400 f.p.s.

Nice looking bullet.

w30wcf

[Tom Myers]

The Link to the Precision Ballistic Coefficient Estimator was missing a backslash. This one will get you there:

http://www.uslink.net/~tom1/calcbc/calcbc.htm

Entering the dimensions and weight gives the result as shown




I scaled out the dimensions from the photograph and entered the values into my Bullet Design Software and the only way I could get 460 grains was to use a Pure Lead alloy.
The drawing appears to be fatter than the one in the photo, but it is not,. Just and illusion.
Using a 1/20 Tin/Lead alloy, the software calculated a 445 grain bullet with a comparative estimated BC of 0.2761.
If the velocity range of this bullet is over Mach 1 then these estimates will probably be on the high side, but for velocities under Mach 1, they should not be too far off.

Tom Myers
Precision Ballistics and Records

[charger 1]

Wow,never seen that page before. Thanks fellas. So runnin over the chrony at near 2400 it ouhta be deadly

[JDL]

Wow,never seen that page before. Thanks fellas. So runnin over the chrony at near 2400 it ouhta be deadly

And quite painful just behind the buttplate!!! -JDL

[charger 1]

Two animals. A bang stick in between. The bang stick goes off.Both animals fall down. If I'm the animal that gets back up I win

[bruce drake]

I'll remind you of that quote when you are posting that you are typing one-armed due to a recent shoulder separation

Bruce

[charger 1]

I'll tell you though it sure is sweet to be gettin FULL magnum velocity and energy from a magnum. When you wack the biggest poplar tree in the nearby boreal forest and put a 3' long split in it that you can see daylight through. God bless cast,God bless LBT,and God bless Jack Lott

[Bass Ackward]

.460, 460 grs with check,1.073" long,.320"frontal..I'm thinkin in the low .200 bc's. Any thoughts

Yep. Set up at @ 300 yards and see what it is. See how far it drops and you will have a very good idea what the BC is when you start it out that fast.

[charger 1]

Yep. Set up at @ 300 yards and see what it is. See how far it drops and you will have a very good idea what the BC is when you start it out that fast.

Bc and trajectory were a point of interest to me. My primary desire is to be able to hit an oncomming bear and give him the appearance of just having tried to **** out a beach ball