Reloadingtips.com

 
 

 

Address
web@loansoftware.com

 

 
 
 



Test the assertion:

BNH of water cooled bullets cast from alloys with antimony changes as they age.



Revised 03/12/12

Experiment 2011-10-30

Introduction:

BNH vs Time for Water dropped cast bullets vs AC bullets.
Bullet = Lee 430-240-SWC
Alloy 50/50 reclaimed bullet cores / Linotype
Brinell 14

Number cast 59  ( 60 but scraped one. )
First Brinell reading one hour after cast.

Water Cooled bullets have red mark on nose
Air cooled bullets have green mark on nose
All bullets are numbered sequentially with a black Sharpie
There will be two bullets numbered 1 ,2, etc. A green bullet and a red bullet for each number

Notes:
Some impressions are not measurable due to irregularities in the bullet surface. These bullets are discarded
Impressions are never perfectly round. The number recorded will be the average diameter in millimeters.

Results summary:
Each measurement is the average of six bullets

Date Day Average Air   Average Water

No.
Impression Cooled   Impression Cooled


MM
BNH
  MM BNH
10/31/11 0 1.50 14.9   1.39 17.4
11/01/11 1 1.63 12.5   1.27 20.9
11/02/11 2 1.29 20.4   1.20 23.5
11/03/11 3 1.53 14.2   1.12 27.2
11/04/11 4 1.31 19.5   1.26 21.3
11/05/11 5 1.45 15.9   1.18 24.2
11/06/11 6 1.41 16.9   1.14 26.3
11/07/11 7 1.55 13.8   1.14 26.1
11/08/11 8 1.29 20.3   1.10 27.9
11/09/11 9 1.35 18.4   1.10 28.1
11/10/11 10 1.28 20.6   1.21 23.1
11/11/11 11 1.39 17.3   1.17 24.8
11/12/11 12 1.42 16.6   1.22 22.7
11/13/11 13 1.46 15.8   1.24 21.9
11/14/11 14 1.44 16.1   1.26 21.3
11/15/11 15 1.31 19.6   1.25 21.7
11/17/11 17 1.33 19.0   1.29 20.2
11/19/11 19 1.34 18.6   1.27 20.9
11/21/11 21 1.35 18.5   1.23 22.3
11/23/11 23 1.38 17.7   1.39 17.3
11/25/11 25 1.44 16.2   1.32 19.3
11/27/11 27 1.42 16.7   1.42 16.5
11/29/11 29 1.43 16.3   1.34 18.6
12/01/11 31 1.39 17.5   1.40 17.1
12/03/11 33 1.35 18.5   1.30 20.0
12/05/11 35 1.31 19.6   1.39 17.3
12/07/11 37 1.25 21.7   1.24 21.9
12/09/11 39 1.38 17.6   1.31 19.8
12/12/11 42 1.45 15.9   1.48 15.2
12/15/11 45 1.32 19.5   1.29 20.1
12/19/11 49 1.34 18.8   1.28 20.5
12/24/11 54 1.41 16.9   1.33 19.0
12/29/11 59 1.34 18.8   1.34 18.7
01/03/12 64 1.32 19.3   1.31 19.5








   

 

chart

 

 

 

See Raw Data Here.

 

Questions or comments: 

web@reloadingtips.com

 

Measurements began 10/30/2011  
   
 

 
 

home | products | about use-mail


 
 

Right 1
Right 2


Right 3