12 Gauge Pressure

[maverick936]

I was loading Winchester AA 12 Gauge hulls with 1 1/8 OZ lead and a Remington 209P primer for a total of 8,100 PSI and I noticed that i had inadvertently loaded 1 1/4 OZ and not 1 1/8 oz - what are the dangers of excessive pressure in the chamber because of this?

I posted this in the reloading section too (please remove if this is in the incorrect fourm)

Thanks for the help.

 

[Beretta687EELL]

Check on the web site of the powder manufacturer. They may list a load in their field load section for what you have loaded.

 

[RobSmith]

I wouldn't worry about it too much, 1/8oz extra projectile should be well within the built-in "safety margin", unless your gun is an antique built to different standards to begin with.

 

[Covey Ridge]

One should always worry when deviating from tested data. You only mentioned hull and primer. Which wad was used and which powder? How much powder?

 

[Claybuster]

One should always worry when deviating from tested data. You only mentioned hull and primer. Which wad was used and which powder? How much powder?

X2. Without those details and no one can say definitively one way or the other.

The people who are saying you shouldn't worry aren't risking their gun and body parts if they are wrong. You are.

 

[Covey Ridge]

Without further information, I would say to pull those loads apart and start over with following the recipe exactly.

 

[catnthehatt]

Without further information, I would say to pull those loads apart and start over with following the recipe exactly.

X2!!
1/8oz can run way over fast, depending on the powder and hull/wad combination....
Cat

 

[planemaker]

X2!!
1/8oz can run way over fast, depending on the powder and hull/wad combination....
Cat

X3

For all the above mentioned reasons !!!

A fast powder used for a target load that is being asked to push a severly overweight shot charge sounds like a quite easy way to run the pressure up more than mildly extreme.
Check the receipies for your powder and components, if there is not one that is EXACTLY as you have assembled, don't risk a blow- up, injuring yourself and most especially ..... a bystander.

 

[struff55]

if it is a medium burning powder such as Win 473 or green dot you may be ok there is loading data for 1 1/8 and 1 1/4 with powders in this burning range but the wad and primers will also effect pressure i would just dissemble them .

 

[Covey Ridge]

It's been a couple days since we heard from the original poster, so maybe those loads didn't work out.

 

[bangbang]

again--dump the loads---that is the best advise --

 

[NZClaybuster]

for the price of a hull , dismantle, reload, enjoy