housedad
08-10-2010, 01:33 AM
I realized today, While sorting 45 ACP brass by headstamp, that I was in a unique position to determine the variance of weights between some of the different makers of brass. I just got done sorting about 15,000 cases by headstamp, and I had a good assortment of brass manufacturers.
So, I proceeded to take 3 samples of 10 from each manufacturer. I weighed each batch with my counting scale, Which is accurate to .001lbs (about 1/2 gram.) Then the three readings are averaged together. Not a perfect test using this scale, to be sure, but it is pretty indicative after the different batches are weighed and averaged.
Anyway, 3 batches of 10 cases of each manufacturer, each batch weighed twice, and sale zeroed before each reading. All are commercial except I believe the WCC Match. All the brass had already been tumbled in walnut in my cement mixer for at least 4 hours.
All weights shown below are shown in thousandths of a pound. ie: Federal is 12.6 thousandths of a pound.
In no particular order:
Federal 12.6
Speer 12.9
Winchester 12.8
Starline 12.7
PMC 13.4
CBC 12.9
CCI 12.9
WCC Match 12.1 (years 96 and 98)
S&B 12.7
Fiocci 12.3
Blazer 12.5
CorBon 12.6
G.F.L. 12.9
W.W. 14.0
AMERC 14.1 (before you ask, yes I threw all the Amerc away. I had to dig in the trash to get the samples )
I hope someone finds this interestin and useful....
Bion
So, I proceeded to take 3 samples of 10 from each manufacturer. I weighed each batch with my counting scale, Which is accurate to .001lbs (about 1/2 gram.) Then the three readings are averaged together. Not a perfect test using this scale, to be sure, but it is pretty indicative after the different batches are weighed and averaged.
Anyway, 3 batches of 10 cases of each manufacturer, each batch weighed twice, and sale zeroed before each reading. All are commercial except I believe the WCC Match. All the brass had already been tumbled in walnut in my cement mixer for at least 4 hours.
All weights shown below are shown in thousandths of a pound. ie: Federal is 12.6 thousandths of a pound.
In no particular order:
Federal 12.6
Speer 12.9
Winchester 12.8
Starline 12.7
PMC 13.4
CBC 12.9
CCI 12.9
WCC Match 12.1 (years 96 and 98)
S&B 12.7
Fiocci 12.3
Blazer 12.5
CorBon 12.6
G.F.L. 12.9
W.W. 14.0
AMERC 14.1 (before you ask, yes I threw all the Amerc away. I had to dig in the trash to get the samples )
I hope someone finds this interestin and useful....
Bion