Case and web thickness are different for magnum cases?
I have found that most cases of the same brand head stamp Mag vs Special or +P vs regular are virtually identical as far as the thickness. Not all cases have the exact same internal capacity from brand to brand, but even that is likely only a small amount when dealing with handgun loads and should make little difference unless one is up there in the Max pressure range. It is my opinion that the head stamp is likely the only real difference between them.
I know this is about a repeat of what has already been posted. A change in the space between the powder and the base of the bullet could certainly make a good bit of difference in chamber pressure, thus a seated out .38 Special or .44 Special could very easily have the same pressure/velocity of the Mag case using the same bullet and powder charge.
On the other hand, a bit smaller charge in the shorter cases using the same bullet, but with it seated closer to the powder can bring up the pressure and bring the resulting velocity closer to that of the Magnum cases that have the slightly larger charge. Most likely, the strength of the cases would show very little difference.
Edited by Ham Gunner on February 19 2017 at 10:06am
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