flat primers
New Winchester 357's, not reloads, with flat primers when shot. Looks like they were loaded way too hot. Has anyone else noticed this?
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As long as the primers do not "crater" the ammo is within the pressure's allowed for that ctg. I would assume that this ammo is loaded to near Max. pressure. 0 -
What do you mean by "carter"? 0 -
The primer was FLAT when you placed it into the gun, and it's still flat after you fired it. So what's the problem?
NOW, if the cartridge has a CONVEX primer in it, and that came out flat, than you would have a problem.
IOW back when Jesus was still a corporal, we had convex primers to work with. THOSE were the ones we checked for flattening, not the ones that came out of the package already flat.0 -
primers are not flat, they are rounded. So when you over load a shell they push back against the pistol back and flatted out. These factor loads fill the whold bevel of the primer pocket. 0 -
You can't get magnum performance w/o pushing the upper pressure limit. I've loaded a lot of rifle ammo and some 357 ammo that showed flattened primers with sharp corners instead of a radius at the edge of the pockets. 0 -
sounds normal 0 -
Do not worry about the flat primers, they are a poor indicator of pressure issues. Cratering can be caused by a firing pin hole too large, that too is a poor indicator of pressure issues. Flat primers can be caused by LOW pressure also. 0 -
quote:Originally posted by peddler
primers are not flat, they are rounded. So when you over load a shell they push back against the pistol back and flatted out. These factor loads fill the whold bevel of the primer pocket.
Today's primers are FLAT, they do have a radiused corner however. CONVEX primers are dome shaped, about the same shape/look as a 22LR bullet nose.
BTW, your problem is more likely excessive clearance between the case head and the recoil shield, than it is excessive pressure
Below are 3 (flat) primers, starting, max and over
Note the primer profile in the below photo's0 -
Thanks for the info. 0 -
Wow, tailgunner, those are some oddballs... the top one looks like a sectioned 6.5 Carcano multi ball gaurd round.
Anyhow, a flat primer can be caused by pressure, yes; it can also, however, be caused by excessive headspace. The primer backs out on firing, and as pressure drops, the case moves back and reseats and flattens it.0 -
Gunner- great photos. Is the bottom one a S&W Self Lubricating? 0
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