OP
OP
Poper
Member
Well, here we go again....
So, with all of the parameters of the original test remain unchanged with the exceptions that (1) the brass is now once fired and (2) the powder charge was increased to 54.5 grains of IMR 4350 from 53.5 grains IMR 4350.
Primer Comparison Test UPDATE:
RIFLE: Weatherby Vanguard / Howa 1500; .30-06 Springfield
LOAD: From Berger Manual, 1st Edition – 51.5 gn (2662 fps) to 57.5 gn (2981 fps)
BULLET: 155 Grain Berger VLD Hunting (weight matched)
CASE: Remington, new, FL sized & trimmed, de-burred, chamfered, flash hole de-burred, primer pocket uniformed.
POWDER: IMR 4350 (54.5 grains)
PRIMERS: Remington 9-1/2, MagTech 9-1/2, CCI-200, Winchester WLR
COAL: 3.340”
Range Conditions:
Ideal; Wind = 0-5 mph from behind, Temp. = 70 deg. to 80 deg., Humidity = 44%
Test rounds were fired at 100 yards in ten round strings with breaks for cleaning and barrel cooling between strings only. This was a load never fired in this rifle previously.
Abstract testing conditions:
Testing was performed at the same public range controlled by NRA certified range personnel and actually fired from the same shooting bench. However, a couple of significant differences of the shooters on either side is noted.
During the previous test, the bench immediately to my right had two different shooters over the course of firing. The first shooter was firing a .300 Win. Mag. and often showed an "error" reading from his muzzle blast on my chronograph. I was getting the occasional "error" reading from the previous shooter on my left during the first test who was shooting hand guns, at least one of which appeared to be a .44 Magnum.
During the full course of the re-test, I had a friend at the table to my right shooting .22lr. and a friend to my left shooting a .223 AR and a S&W M&P .22lr. No error readings were noted throughout the course of firing all test rounds.
THE TEST DATA:
String #1: Remington 9-1/2
H = 2889.01
L = 2847.56
A = 2869.46
ES = 41.45
SD = 11.91
String #2: MagTech 9-1/2
H = 2953.87
L = 2836.21
A = 2918.76
ES = 117.66
SD = 33.92
String #3: CCI-200
H = 2896.62
L = 2854.94
A = 2874.17
ES = 41.68
SD = 12.20
String #4: Winchester LRP
H = 2933.11
L = 2866.44
A = 2896.05
ES = 66.67
SD = 21.09
CONCLUSIONS:
This is certainly not a definitive test. Definitive testing would require a larger test group of multiple groups of components. It is logical only to conclude that there is a difference in primers and how they behave in a particular recipe. To conclude definitively exactly how any of the primers within this test performed with this exact recipe would require the test to be repeated at least 2 more times and have those results closely compare with the result obtained with this test.
Being restricted to a single bullet and a single powder, the only real conclusion it that there IS a measurable difference in primers and their performance in a particular load recipe in a particular firearm.
Is that difference great? Well, using the Standard Deviation as a yardstick, apparently the Mag Tech 9-1/2 primer is roughly 3x as variable as the Remington 9-1/2. However, the MagTech primer produced an average velocity 49fps greater than the Remington.
Another interesting relationship that appeared in this test result was that the Remington primer and the CCI primer performed almost identically with only a 4.71 fps Average Velocity difference and 0.29 fps difference in their standard deviation, which leaves me with the impression that in this particular recipe of powder, brass and bullets, these primers could be interchanged without a noticeable difference in performance in this particular rifle.
Anyway, the test was fun and the results were very interesting and informative for me.
Poper
So, with all of the parameters of the original test remain unchanged with the exceptions that (1) the brass is now once fired and (2) the powder charge was increased to 54.5 grains of IMR 4350 from 53.5 grains IMR 4350.
Primer Comparison Test UPDATE:
RIFLE: Weatherby Vanguard / Howa 1500; .30-06 Springfield
LOAD: From Berger Manual, 1st Edition – 51.5 gn (2662 fps) to 57.5 gn (2981 fps)
BULLET: 155 Grain Berger VLD Hunting (weight matched)
CASE: Remington, new, FL sized & trimmed, de-burred, chamfered, flash hole de-burred, primer pocket uniformed.
POWDER: IMR 4350 (54.5 grains)
PRIMERS: Remington 9-1/2, MagTech 9-1/2, CCI-200, Winchester WLR
COAL: 3.340”
Range Conditions:
Ideal; Wind = 0-5 mph from behind, Temp. = 70 deg. to 80 deg., Humidity = 44%
Test rounds were fired at 100 yards in ten round strings with breaks for cleaning and barrel cooling between strings only. This was a load never fired in this rifle previously.
Abstract testing conditions:
Testing was performed at the same public range controlled by NRA certified range personnel and actually fired from the same shooting bench. However, a couple of significant differences of the shooters on either side is noted.
During the previous test, the bench immediately to my right had two different shooters over the course of firing. The first shooter was firing a .300 Win. Mag. and often showed an "error" reading from his muzzle blast on my chronograph. I was getting the occasional "error" reading from the previous shooter on my left during the first test who was shooting hand guns, at least one of which appeared to be a .44 Magnum.
During the full course of the re-test, I had a friend at the table to my right shooting .22lr. and a friend to my left shooting a .223 AR and a S&W M&P .22lr. No error readings were noted throughout the course of firing all test rounds.
THE TEST DATA:
String #1: Remington 9-1/2
H = 2889.01
L = 2847.56
A = 2869.46
ES = 41.45
SD = 11.91
String #2: MagTech 9-1/2
H = 2953.87
L = 2836.21
A = 2918.76
ES = 117.66
SD = 33.92
String #3: CCI-200
H = 2896.62
L = 2854.94
A = 2874.17
ES = 41.68
SD = 12.20
String #4: Winchester LRP
H = 2933.11
L = 2866.44
A = 2896.05
ES = 66.67
SD = 21.09
CONCLUSIONS:
This is certainly not a definitive test. Definitive testing would require a larger test group of multiple groups of components. It is logical only to conclude that there is a difference in primers and how they behave in a particular recipe. To conclude definitively exactly how any of the primers within this test performed with this exact recipe would require the test to be repeated at least 2 more times and have those results closely compare with the result obtained with this test.
Being restricted to a single bullet and a single powder, the only real conclusion it that there IS a measurable difference in primers and their performance in a particular load recipe in a particular firearm.
Is that difference great? Well, using the Standard Deviation as a yardstick, apparently the Mag Tech 9-1/2 primer is roughly 3x as variable as the Remington 9-1/2. However, the MagTech primer produced an average velocity 49fps greater than the Remington.
Another interesting relationship that appeared in this test result was that the Remington primer and the CCI primer performed almost identically with only a 4.71 fps Average Velocity difference and 0.29 fps difference in their standard deviation, which leaves me with the impression that in this particular recipe of powder, brass and bullets, these primers could be interchanged without a noticeable difference in performance in this particular rifle.
Anyway, the test was fun and the results were very interesting and informative for me.
Poper
