The only way reaming itself could have caused this is if you reamed the recess of that chamber quite a bit deeper. It is important to stop reaming when the recess cutters touch the bottom of original recesses.

There is what Toolguy says. Make sure your cartridges are fully seating. If not fully seated the first part of energy from firing pin is used up slamming the case deeper and only the remainder of energy is left to crush rim and fire primer.

Algeciras, disassemble your cylinder, make sure there is no crud or reamer chips in the hole the yoke tube rides in, that the back side of extractor is completely clean. A small piece of material between tube end and the cylinder could effect this. Also the center pin may be sticky and causing your hitting something feeling.

Another thing. Look hard at that chamber if you ever dry fired it, there maybe a bit of a mar where firing pin struck edge of chamber, moving a bit of metal into the recess area and causing your case not to fully seat.

Another thing I would check on a misfiring 22 rimfire is endshake. If there is excess endshake some of the inertia from hammer is used up moving cylinder forward.