Peter M. Eick
Member
First the Facts.
The rifle is a 25-06 sendero remington 700.
It gives some pressure signs with factory ammo. Most commonly ejector marks. This occurs on most rounds, but not every one fired.
It was 60f on the range and very windy.
The load was straight from the seirra manual. I actually duplicated it exactly to run this experiment.
45.5 grns of IMR4350 with the 90 grn JHP (max load is 53.7 grns).
I get ejector marks and sheared ejector holes with this, the starting load. And the accuracy was poor, 2" patterns for 50 shots.
Ideas?
Now, it gets odd. I can load 53 grns of IMR 4831 with the same bullet and setup and no pressure signs (max load is 54.9 grns), accuracy was good 1" single hole for 50 shots.
Why? If the rifle was at fault, would it not have the same pressure and velocity limits?
My conjecture is that my gun just does not like 4350 or I have a fast lot of the stuff. This is unfortunate because most manuals list 4350 as a "go to" powder for the 25-06. Otherwise I have a hard time explaining why I can go a near max load with 4831 yet I cannot go a starting load with 4350.
As another tidbit, I was shooting 52 grns of 4831 with a 100 grn spire point and got great accuracy and no pressure signs.
The rifle is a 25-06 sendero remington 700.
It gives some pressure signs with factory ammo. Most commonly ejector marks. This occurs on most rounds, but not every one fired.
It was 60f on the range and very windy.
The load was straight from the seirra manual. I actually duplicated it exactly to run this experiment.
45.5 grns of IMR4350 with the 90 grn JHP (max load is 53.7 grns).
I get ejector marks and sheared ejector holes with this, the starting load. And the accuracy was poor, 2" patterns for 50 shots.
Ideas?
Now, it gets odd. I can load 53 grns of IMR 4831 with the same bullet and setup and no pressure signs (max load is 54.9 grns), accuracy was good 1" single hole for 50 shots.
Why? If the rifle was at fault, would it not have the same pressure and velocity limits?
My conjecture is that my gun just does not like 4350 or I have a fast lot of the stuff. This is unfortunate because most manuals list 4350 as a "go to" powder for the 25-06. Otherwise I have a hard time explaining why I can go a near max load with 4831 yet I cannot go a starting load with 4350.
As another tidbit, I was shooting 52 grns of 4831 with a 100 grn spire point and got great accuracy and no pressure signs.