Author: britrifles
Subject: Full case resizing
Posted: July 11 2018 at 6:27pm
If you fully resize the case, such that the she!! holder is pushed with firm contact to the base of the F/L die, the shoulder of the case is pushed back to original cartridge specs. These chambers are made to accommodate the cartridge plus a lot dirt, and still be able to close and lock the bolt. So the shoulder gets blown forward upon firing. F/L sizing will cold work the shoulder of the case and it will soon crack from a few reloads. I also think that this procedure quickly results in case head separations (circumferential cracks around the case body about 1/2 inch above the case head) as the body of the case streatches to fill the chamber.
Neck sizing avoids this and will greatly extend the life of the cartridge case. Alternatively, back the F/L die out of the press enough so that the shoulder of the case is just touched by the die. Others have posted a procedure to follow for sizing in this manner.
Subject: Full case resizing
Posted: July 11 2018 at 6:27pm
If you fully resize the case, such that the she!! holder is pushed with firm contact to the base of the F/L die, the shoulder of the case is pushed back to original cartridge specs. These chambers are made to accommodate the cartridge plus a lot dirt, and still be able to close and lock the bolt. So the shoulder gets blown forward upon firing. F/L sizing will cold work the shoulder of the case and it will soon crack from a few reloads. I also think that this procedure quickly results in case head separations (circumferential cracks around the case body about 1/2 inch above the case head) as the body of the case streatches to fill the chamber.
Neck sizing avoids this and will greatly extend the life of the cartridge case. Alternatively, back the F/L die out of the press enough so that the shoulder of the case is just touched by the die. Others have posted a procedure to follow for sizing in this manner.