Originally Posted by tlk
Reading "Precision Shooting". First chapter talks about the setup of new cases. Not a lot of info is given as to getting anything out of the first shot with these cases other than good fire-formed brass for your chamber. Makes it sound like proper case prep for its life in your gun is the ONLY objective for the first shot.
Am I reading this correctly? What do you do with this initial load?
There are a couple of ways to go about it.
One is the COW (Cream of Wheat/Corn Meal) method.
Put the "correct" of fast burning powder (Unique) for the cartridge, fill the case with Corn Meal, and seal with a ball of Tissue Paper.
For forming cases where the sides have been straightened and the shoulder moved out with a different angle the COW method will get you about 98 there.
For fire forming non wild cat cartridges it's probably 100% effective.
If used be careful with the ring of residue built up on the case mouth.
Also, no magnum primers and watch barrel head. It will heat rapidly.
What I now do is with a new batch of cases (50 or 100) I load the case with a fire forming load which is nothing more that a reduce normal load, bullet and all, and go hunting with them. In my rifle the fire forming load in no less accurate (coyote accurate) than the normal load, just a little slower.
My barrel has a limited life and I want to get as much out of it as I can.