1000 yard shooting - fact or fiction

Modern Muzzleloading Forum

Help Support Modern Muzzleloading Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

52Bore

Well-Known Member
*
Joined
Jul 26, 2014
Messages
2,840
Reaction score
1,387
Ran across this today and thought I'd share.
This might also shed some light for some as to trajectory of heavy conicals.
In 1997, I had to prove to my local range BOD that my trajectory was safe for someone in the pits. JBM ballistics is all I had, I plotted out every 10yds from muzzle to 1000 of my BP load and compared a HP 30-06 on AutoCAD and determined the flowing graph. The photo shows the pits and the counterbalance target frame along with the seat and concrete wall & dirt hill behind the target puller. Trajectory is show at the lowest spot possible.
Back then, I don't recall that BC was a consideration in JBM, but I came up with right at 4 degree impact angle based off my drawing, 30-06 was 1.5 degrees.
Two impact lines approaching from 1000 yards; 530gr lead bullet with BP @ 1300 MV fps.; 30-06: 180gr @ 2700 MV fps. I don't recall the 30-06 MV at the target, but the 530gr BP load was around 800 fps. Remember, this was done nearly 20 years ago, based on this I was approved to hold matches.
 

Attachments

  • Traj 1000 approach.JPG
    Traj 1000 approach.JPG
    80.9 KB · Views: 299
A few years later (2005), a friend from CA (we never met, but corresponded. Unfortunately he passed away this year) sent my the following actual impact test from 1000, shooting a BPCR.

Leveling the targets so he can measure the distance from the top of each target to the actual bullet impact. The distance between the targets was 58".


His Rifle and Load. MV a little lower than expected, but 45-70 case is the limitation.


His bullet, found it's still available. Do not know the BC, but .37 is close to mine, so it puts his velocity at the target around 750fps.
 

Attachments

  • Dan T bullet.JPG
    Dan T bullet.JPG
    115.1 KB · Views: 296
  • Dan T level.jpg
    Dan T level.jpg
    95.9 KB · Views: 296
  • Dan T load.jpg
    Dan T load.jpg
    87.5 KB · Views: 296
Actual bullet data from impact at 1000.


Calculating the angle of approach.
Tangent (Trajectory Angle) = 4.4/58"
Inv Tan (4.4/58) = 4.3 degree

I can attest, that a heavy conical bullet traveling at 800 fps from 1000 yards will plow right thru a 2x4 upright edgewise and keep on trucking, hitting the impact area behind the target like it never hit anything.
 

Attachments

  • Dan T drop.JPG
    Dan T drop.JPG
    58.6 KB · Views: 296
Projectile looks very similar to what I'm casting.
500gn .459
152e29ee02d5a3e3963618158e220b6a.jpg


Sent from my SM-G900I using Tapatalk
 
Yes, it seems the same bullet used in the actual test, I assume you are shooting it in a BPCR?
 
Kind of. Still at the load development stage.
Using smokeless at the moment.
An Australian powder made by ADI (Thales) 28.5 grains of AR2207. Im using light loads as I need to stay under 18000cup.
I might load BP in these in the future. Oh, 45/70 Pedersoli Trapdoor.
e9945fe8c9040d4c90bde06a9ac1add4.jpg


Ive since put a front tunnel on and things have picked up significantly.
bcd9ecfecbbaf6e814b0512e5695cb7d.jpg
at 100 metres.

Sent from my SM-G900I using Tapatalk
 
You're getting there, but it's not a ML and unfortunately this is not the platform for cartridge rifles - thanks for sharing.
 
Edited to repost photos for some other shooters in another country.
 

Latest posts

Back
Top