Cannuler vs non cannuler
- Thread starter fokai_zach
- Start date
Re: Cannuler vs non cannuler
Perhaps you mean a Cannelure as in: The circumferential groove, generally of corrugated appearance, cut or impressed into a bullet. The purpose of the cannelure is to hold the bullet in the case and is used when a roll crimp is applied to the bullet.
So if you want to use a roll crimp, your bullet better have a cannelure. If not then you don't need it. Savy?
Perhaps you mean a Cannelure as in: The circumferential groove, generally of corrugated appearance, cut or impressed into a bullet. The purpose of the cannelure is to hold the bullet in the case and is used when a roll crimp is applied to the bullet.
So if you want to use a roll crimp, your bullet better have a cannelure. If not then you don't need it. Savy?
Re: Cannuler vs non cannuler
cannelures are the groove that go around the bullet. it is there for a few reasons, one of them being to have something to hold onto for crimping the lip of the top of the brass. this is to help stop the bullet from being pushed into the case when being fed into the chamber where it makes contact with the feeding ramp.
it's also there to prevent the opposite - having the bullet moving forward out of the casing when chambered (coming to that sudden stop) especially when talking semi autos.
it could also be used for a rough measurement when determining OAL (gets you in the neighbor hood)
just because it has a cannelure doesn't mean you have to crimp it (except of course for semi autos, i'm sure this'll go off topic when the semi guys chime in). usually the pressure of the casing will hold the bullet tightly enough to keep it in place for bolt gun applications. most of your target ammo is cannelureless, as it's thought the little bit of pressure / resistance of a roll crimp can effect the bullet leaving the case when fired, and that the groove in the bullet can effect bullet flight by causing a small disturbance while in flight.
for safety (and accuracy) reasons, when using cannelureless heads, i like to give it a slight taper (for loss of a better term) crimp just to make sure the bullet stays in place.
cannelures are the groove that go around the bullet. it is there for a few reasons, one of them being to have something to hold onto for crimping the lip of the top of the brass. this is to help stop the bullet from being pushed into the case when being fed into the chamber where it makes contact with the feeding ramp.
it's also there to prevent the opposite - having the bullet moving forward out of the casing when chambered (coming to that sudden stop) especially when talking semi autos.
it could also be used for a rough measurement when determining OAL (gets you in the neighbor hood)
just because it has a cannelure doesn't mean you have to crimp it (except of course for semi autos, i'm sure this'll go off topic when the semi guys chime in). usually the pressure of the casing will hold the bullet tightly enough to keep it in place for bolt gun applications. most of your target ammo is cannelureless, as it's thought the little bit of pressure / resistance of a roll crimp can effect the bullet leaving the case when fired, and that the groove in the bullet can effect bullet flight by causing a small disturbance while in flight.
for safety (and accuracy) reasons, when using cannelureless heads, i like to give it a slight taper (for loss of a better term) crimp just to make sure the bullet stays in place.
