I haven't ventured into neck turning yet and was wanting to learn more before possibly spending $$.In what situation would reaming be a better option?it dosn't seem many do it as opposed to n/turning.I'm using bushing dies with no expander plug for 20 cal,reaming would be the cheaper option i think,any advice would be appreciated
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neck turn vs reaming?
- Thread starter pjss
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Re: neck turn vs reaming?
If you were forming cases and the necks were too thick then internal reaming would be good. As a lot of the inconsistancy is thrown to the inside by forming.
For loading with factory formed brass that is good quality in a factory chamber , then there is not a huge amount to be gained by neck turning . However some accuracy can be gained by neck turning in this regard but it requires , partial neck sizing , body die sizing in addition to neck turning to make it work better.
If the factory brass is bad quality with uneven neck thickness then a slight clean up with a turner can help neck tension consistancy and seating concentricity .
Even without partial neck sizing and body die sizing.
For a factory chamber you only clean up the neck about 75% of the surface diameter not a full cut on every case because you want to save as much thickness as possible.
Thats enough to keep things straighter.
Reaming and neck turning is two different jobs in seperate areas of the neck both have a certain positive effect in certain circumstances.
The problem is that there is not enough brass thickness in most case necks to do both to a consistant degree . You may wind up with overly thin necks and that will effect case life at the case mouth making splitting more likely as the case neck hardens. Also increas neck to chamber clearance excessivly if no partial sizing is used.
I am sure that most brass would benifit from both reaming and neck turning because the drawing process to make them is not that perfect but it's having the thickness to do it.
An internal reamer would be a cheaper option than the neck turner and new sizing dies. However I am not convinced that it has the potential to do as much good as a neck turn at improving the things mentioned above.
The neck turner works off the inside neck however uneven but at least does follow that average center line of the neck . As a result the outside is turned to be parrallel with that average center line . It straightens up upon fireforming if it is out of line with the case body hopefully. With a reamer you have to use a die that the whole case goes into and the reamer machines the inside neck with the support of the die and the cutting forces in the neck which may or may not be the avergae centerline of the whole case in the die . This may or may not be inline with the average centerline of the neck afterwards but would be closer than manufacture in most cases . After fire forming it may or may not be perfectly straight.
I am not convinced that the reamer is as potentially accurate as a neck turner with regard to the parrallelism of the case neck.
Jeez I need a coffee. All those big words.
If you were forming cases and the necks were too thick then internal reaming would be good. As a lot of the inconsistancy is thrown to the inside by forming.
For loading with factory formed brass that is good quality in a factory chamber , then there is not a huge amount to be gained by neck turning . However some accuracy can be gained by neck turning in this regard but it requires , partial neck sizing , body die sizing in addition to neck turning to make it work better.
If the factory brass is bad quality with uneven neck thickness then a slight clean up with a turner can help neck tension consistancy and seating concentricity .
Even without partial neck sizing and body die sizing.
For a factory chamber you only clean up the neck about 75% of the surface diameter not a full cut on every case because you want to save as much thickness as possible.
Thats enough to keep things straighter.
Reaming and neck turning is two different jobs in seperate areas of the neck both have a certain positive effect in certain circumstances.
The problem is that there is not enough brass thickness in most case necks to do both to a consistant degree . You may wind up with overly thin necks and that will effect case life at the case mouth making splitting more likely as the case neck hardens. Also increas neck to chamber clearance excessivly if no partial sizing is used.
I am sure that most brass would benifit from both reaming and neck turning because the drawing process to make them is not that perfect but it's having the thickness to do it.
An internal reamer would be a cheaper option than the neck turner and new sizing dies. However I am not convinced that it has the potential to do as much good as a neck turn at improving the things mentioned above.
The neck turner works off the inside neck however uneven but at least does follow that average center line of the neck . As a result the outside is turned to be parrallel with that average center line . It straightens up upon fireforming if it is out of line with the case body hopefully. With a reamer you have to use a die that the whole case goes into and the reamer machines the inside neck with the support of the die and the cutting forces in the neck which may or may not be the avergae centerline of the whole case in the die . This may or may not be inline with the average centerline of the neck afterwards but would be closer than manufacture in most cases . After fire forming it may or may not be perfectly straight.
I am not convinced that the reamer is as potentially accurate as a neck turner with regard to the parrallelism of the case neck.
Jeez I need a coffee. All those big words.
Re: neck turn vs reaming?
thanks country thats made things alot clearer,always wondered why reaming wasnt talked about much.might leave it till a custom rifle comes along middle of the year hopefully!!
cheers for that.
thanks country thats made things alot clearer,always wondered why reaming wasnt talked about much.might leave it till a custom rifle comes along middle of the year hopefully!!
cheers for that.
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