I have picked up a F.LLIPIETTA .44 cal. Navy revolver. I have another different brand Navy revolver and it functions fine but this one acts different. Question is is the cylinder supposed to spin free with the hammer at half ****? With the hammer at 1/2 **** on this revolver the cylinder will not spin. It is locked. Pistol functions fine if you just pull the hammer back as if you are going to fire it. Pull the trigger back and it will fire. The timing is perfect. Just won’t free spin at 1/2 ****. If this is not normal on this what could be causing the problem?