mity2 said:is that a bad sign(the first pic), because mine look like that as well..
TAZ said:My 9mm full size has some flow, but I dont think its that bad. Fiocchi is pretty hot ammo for factory though. No gunsmith, but I dont think that has much to do with the extractor, but more with headspace.
I must respectfully disagree. Head space in a semi-automatic pistol is not controlled by the extractor. If it is, a potentially dangerous situation exists. If the extractor holds the case away from the breech face prior to ignition, the case will slam back into the breech face with possibly catastrophic consequences when it is fired.
The case mouth of a non-bottleneck cartridge is designed to be a specific length, + or - a few thousandths of an inch. That length will correspond to the chamber depth measured from the breech face to the forward edge of the chamber when the breech is locked to the barrel. A go/no go gauge is sometimes used to verify correct headspace. The breech will close on the go gauge but will not close on the no go gauge.
If a case is too short to maintain proper head space, it may be possible to establish correct head space by seating the bullet out far enough so that it contacts the throat of the chamber and seats the case firmly against the breech face, effectively insuring safe head space. You can tell whether or not a cartridge will properly head space in a chamber by removing the barrel and dropping a cartridge into the chamber. Your finger is sensitive enough to feel whether or not the base of the cartridge is level with the flat of the barrel hood. If the cartridge is below the flat, seat the bullet further out. If the cartridge is above the flat, seat the bullet deeper. This works particularly well with LSWC bullets used for range target practice. Of course, this assumes that the flat of your barrel hood is flush with the breech face of your slide when they are locked.
It should be apparent that crimping the case improperly can easily create a condition of improper head space. A gentle taper crimp can be used but you should use a venier to make sure that you do not over crimp the case and thereby allow it to seat too deeply into the chamber. I never apply a roll crimp to cartridges that are designed to head space on the case mouth.
Ideally, the retention of a bullet in the case is maintained by using a properly sized expander plug mated to the proper size bullet. Sometimes a cannelure is applied to the case to prevent bullet set back if the case tension is unable to hold the bullet in place.
Reloading your own ammunition gives you the ability to control many of the variables that go into making up an accurate, reliable load for your pistol. However, you must first understand those variables and how they work together.
The above is my opinion based upon my life experience and is offered in the spirit of sharing experiences that may benefit someone. What goes around comes around, as they say.