I've heard of this problem before. When you fire a brass-cased shell, the brass expands ever so slightly to the chamber size. This includes expanding the brass into little nooks and crannys in the chamber. When you fire steel-cased ammo, same does not happen because the steel is much harder and inflexible. Also, the steel-cased ammo is coated with a laquer that when cold is actually a lubricant.
The problem may be as simple as a burr inside the chamber that is holding the shell in place after firing. If you look at the brass after you pull it out, check it for longitudinal scratches on the case. If this is what's happening, you might have to go to a gunsmith to locate/remove it, unless you have the tools and skills necessary.
As far as the brass vs. steel case ammo and wear on the gun argument: Unless you are intending to put 10s of thousands of rounds through it, I don't see how these differences could possibly matter. I dismiss it as an old wive's tale.
The problem may be as simple as a burr inside the chamber that is holding the shell in place after firing. If you look at the brass after you pull it out, check it for longitudinal scratches on the case. If this is what's happening, you might have to go to a gunsmith to locate/remove it, unless you have the tools and skills necessary.
As far as the brass vs. steel case ammo and wear on the gun argument: Unless you are intending to put 10s of thousands of rounds through it, I don't see how these differences could possibly matter. I dismiss it as an old wive's tale.
