Primer Pocket Leakage
- Thread starter deerfarmer
- Start date
Primers are not all identical. Once again you speak without knowledge or experience. Sheesh. The differences may be small, but they exist and sometimes can give you one or more uses from brass.
Yes ... new brass from reputable retailers.
Tried a load using a federal magnum LR primer today -- no leakage. I backed the charge down 2 grains to be safe not knowing how much umph the magnum primer would add. I have also been in contact with Winchester and have been very pleased with there level of customer service - I'm sending them back a bag of brass for there inspection,
Thanks for posting the primer chart with diameter's etc. roberti11.
Thanks for posting the primer chart with diameter's etc. roberti11.
The primer acts just like the rings on a piston of a internal combustion engine and seals combustion pressure inside the chamber. Your getting blow-by caused by a primer that isn't sealing the primer pocket. If the cases had less internal volume your primers would be flatter from higher pressure "BUT" it doesn't mean the higher pressure would cause the primer to leak around the circumference of the primer.
Photos of the primers would help but it sounds like the primers are too small in diameter or the primer pocket diameter is too large.
Below is what happens when people reload .223 cases with loose primer pockets in their AR15 and they loose the gas seal and have high pressure gas leakage.
You need the primer to provide a good high pressure seal, please notice below how the primer can move when the cartridge is fired. The primer can move to the rear under pressure and is pushed back into contact with the bolt face. Then the chamber pressure builds higher and the cartridge case stretches to meet the bolt face.
You need to find out if the primers are causing the problem or if the primer pockets are defective on your cases.
SO is the bolt face going to be a issue now....
