Hondo 60
Member
I did a test yesterday.
Temp 53, Barometric Pressure 30.32
125 gr Hornady XTP
15.8 gr Alliant 2400 (mid range load)
OAL 1.575 - seated at the cannelure
1st batch was with Winchester standard Small Pistol Primers.
1 770
2 864
3 1025
4 799
5 881
6 975
7 866
8 915
9 882
10 816
11 640
12 761
As you can see, velocity was all over the map.
(and I hand charged each case)
With the 2nd batch the only difference was, I used Small Pistol MAGNUM Primers.
"Holy Alter Ego, Batman"!
As you can see, velocity was much higher and more importantly, MUCH more consistent!
(only 11 cuz I had 1 data point that read "Error")
1 1088
2 1066
3 1051
4 1063
5 1064
6 1082
7 1073
8 1046
9 1010
10 1042
11 1018
Many years ago, I asked a regular here about using mag primers.
He said with that small of a charge standard would be ok.
Well I guess my data says only use magnum primers!
Temp 53, Barometric Pressure 30.32
125 gr Hornady XTP
15.8 gr Alliant 2400 (mid range load)
OAL 1.575 - seated at the cannelure
1st batch was with Winchester standard Small Pistol Primers.
1 770
2 864
3 1025
4 799
5 881
6 975
7 866
8 915
9 882
10 816
11 640
12 761
As you can see, velocity was all over the map.
(and I hand charged each case)
With the 2nd batch the only difference was, I used Small Pistol MAGNUM Primers.
"Holy Alter Ego, Batman"!
As you can see, velocity was much higher and more importantly, MUCH more consistent!
(only 11 cuz I had 1 data point that read "Error")
1 1088
2 1066
3 1051
4 1063
5 1064
6 1082
7 1073
8 1046
9 1010
10 1042
11 1018
Many years ago, I asked a regular here about using mag primers.
He said with that small of a charge standard would be ok.
Well I guess my data says only use magnum primers!