Video - Round ball vs Conical performance series Part 1


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duelist1954
April 12, 2012, 01:11 PM
This is part 1 of a three part series comparing the performance characteristics of various projectiles shot from a Colt style 1860 Army cap and ball revolver. In this series we will measure the accuracy, velocity and muzzle energy and penetration of round ball versus conical bullets. Part 1 will consist of the round ball performance test.

http://www.youtube.com/watch?v=pGzAuC3O3HM

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mykeal
April 12, 2012, 03:07 PM
Interesting stuff. Thanks for doing this.

Can you publish the chronograph statistics?

AbitNutz
April 12, 2012, 04:24 PM
This something I should be testing as well with my ROA. I can use 40gr under a 220gr BigLube, both solid and Hollow point.
I have a CED chronograph and at one time posted a pic of a 25 yard 6 shot group that was extremely tight.
I just don't shoot RB anymore.

Thanks for the great video!

Pulp
April 12, 2012, 05:15 PM
You might consider posting this over on The Box o' Truth forum.

9 jugs, that's some serious stuff! Looking forward to the video.

duelist1954
April 12, 2012, 07:01 PM
Mykeal,

As I said I only shot 4-shot strings...now what I would do if I was running a Lean 6 Sigma project, but enough to judge the relative merits of each projectile.

RB:
886.8
853.9
875.8
913.6

220-gr conical

726.1
674.5
706.1
766.1


240-gr conical

737.5
752.6
670.3
739.5

Stantdm
April 12, 2012, 08:19 PM
Informative video. I shoot RBs exclusively and appreciated the information.

arcticap
April 12, 2012, 10:10 PM
RB:
886.8
853.9
875.8
913.6

220-gr conical

726.1
674.5
706.1
766.1


240-gr conical

737.5
752.6
670.3
739.5

All of those numbers would seem to indicate that the Chrony survived! :D

Ryden
April 13, 2012, 09:10 AM
That's very interesting!
Not only do they indicate that the chrony survived, but that the RB have the most consistent velocities and so should be the most accurate from this perspective.

They also seem to indicate that the 240gr bullet are faster than the 220gr one, but the difference are much to small vs STD to draw anything conclusive of that data.

RB
---
Avg 882.53
STD 21.50

220 gr Conical
---
Avg 718.20
STD 33.21

240 gr SWC
---
Avg 724.98
STD 32.09

duelist1954
April 13, 2012, 09:20 AM
Ryden, I'm not surprised about the slightly higher velocity from the heavier slugs. I see the same thing in .44 Russian B-P cartridges when going from 200-grain to 240-grain bullets. I think the additional weight resistance raises pressures and velocity.

michaelbsc
April 13, 2012, 08:22 PM
In the video you said you cast the 225 gr conicals. What mold do you use?

frontiergander
April 13, 2012, 11:00 PM
round balls bounce off 2x4's. Believe me, i found out the hard way. I highly doubt the conicals will do that.

duelist1954
April 14, 2012, 07:25 AM
I use a Lee Precision MOLD D C 456-220-1R

Ryden
April 14, 2012, 01:25 PM
Ryden, I'm not surprised about the slightly higher velocity from the heavier slugs. I see the same thing in .44 Russian B-P cartridges when going from 200-grain to 240-grain bullets. I think the additional weight resistance raises pressures and velocity.
You might certainly have a point there, but the difference is only 20% of the standard deviation. Four shots is just not enough of a sample.

It would be very interesting to see a graph of velocity vs weight over the whole span from 100 to 300 gr.

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