MustGoFaster
Member
CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.
The flowing post and specs listed are specific to MY Sig Sauer P225 9mm Luger pistol. This information should not be used with any other firearm! Potentially dangerous situations may occur if this information is used out of context.
That said, other than feeding issues and fitting in magazines are there any issues with loading 9mm Luger ammo over the SAAMI listed max COAL?
In my reading and research I've found that a number of rifle re-loaders say accuracy is improved my reducing the distance between the bullet's original position and the lands in the barrel of the firearm. The information I've found indicates 0.00" to .020" away from the lands is what a number of rifles like.
So following this bit of information, I decided to see how far the bullet had to jump in MY pistol. I found that a fired 9mm case had a reasonably snug fit onto a new, unfired Montana Gold 124gr CMJ projectile.
Starting the projectile into the case, and then pushing the case into the chamber of my barrel, I found that COAL of 1.210" would put the bullet on the rifling of my barrel. SAAMI max COAL is 1.169"
A round loaded at 1.210" will not fit into my factory magazines. 1.190" is the longest I can get to strip out of the magazine only by hand, and manually cycling the pistol, reliably.
So following the rifle reloading bit of wisdom, loading at 1.190 might produce better accuracy out of my pistol.
Other than lower pressures, feeding issues, and ammo loaded to the above COAL being potentially dangerous in other firearms, are there ANY dangers I'm missing? Possible "detonation" since the case volume is increased crossed my mind but with W231 powder I'm using, the case is always filled over the flash hole using anything within any of the factory load data I've found.
The flowing post and specs listed are specific to MY Sig Sauer P225 9mm Luger pistol. This information should not be used with any other firearm! Potentially dangerous situations may occur if this information is used out of context.
That said, other than feeding issues and fitting in magazines are there any issues with loading 9mm Luger ammo over the SAAMI listed max COAL?
In my reading and research I've found that a number of rifle re-loaders say accuracy is improved my reducing the distance between the bullet's original position and the lands in the barrel of the firearm. The information I've found indicates 0.00" to .020" away from the lands is what a number of rifles like.
So following this bit of information, I decided to see how far the bullet had to jump in MY pistol. I found that a fired 9mm case had a reasonably snug fit onto a new, unfired Montana Gold 124gr CMJ projectile.
Starting the projectile into the case, and then pushing the case into the chamber of my barrel, I found that COAL of 1.210" would put the bullet on the rifling of my barrel. SAAMI max COAL is 1.169"
A round loaded at 1.210" will not fit into my factory magazines. 1.190" is the longest I can get to strip out of the magazine only by hand, and manually cycling the pistol, reliably.
So following the rifle reloading bit of wisdom, loading at 1.190 might produce better accuracy out of my pistol.
Other than lower pressures, feeding issues, and ammo loaded to the above COAL being potentially dangerous in other firearms, are there ANY dangers I'm missing? Possible "detonation" since the case volume is increased crossed my mind but with W231 powder I'm using, the case is always filled over the flash hole using anything within any of the factory load data I've found.