Well, as this shows, the believers are gonna' believe "because the guy knows what he's doing" and "because he shoots good" with no concept of how it's good, and no ability to question why.
I'm an unbeliever.
Until someone explains how you can support a reamer to get it to cut a hole off center.... (the point here is to correct eccentric necks... it doesn't matter "how good the Lapua brass is.")
And until someone can explain to me how to set up and establish the outside diameter in relation to this reamer....
I'm an unbeliever.
I'm an unbeliever because I don't believe there's a gain to be had in smoothing up an off center hole in the interest of improving accuracy. Try this process with a long-range gun shooting VLD's......
Learn WHY necks get turned... it ain't to make them shiney and perty.....and it ain't to make then fit the gun.
As a backyard hack with a Harbor Freight lathe in his barn...... it is my opinion, from a machinists standpoint, that the purpose of a reamer is to clean up an established hole, PERIOD.....reamers are not designed to move holes over.
And if you DID support and preload one such that it actually corrected a hole two things are immediately apparent:
-#1, you're using the reamer as a single-point tool, not a reamer.
-#2, the hole would have to be well supported, not like a case neck.
AND........ the question must be asked,,,,,,,,corrected to WHAT???
Ohhh, and AJ300MAG, the writer of the article knows all this..... Page 58, second paragraph from the bottom the writer makes this statement.... "The reamer is held in in a full floating holder, allowing the reamer pilot to follow the inside diameter of the neck keeping the reamer from bell mouthing the neck of the case."
Just so's you understand..... "bell mouthing the case" means cutting a tapered hole.
UUhhmmmmm, it's cause by affixing the reamer, not allowing it to float. The process of correctly using a fixed reamer is too complicated to explain here, heavily dependent on preload and flex characteristics of both the tool and the workpiece.
It is my opinion and assessment that the method outlined in Precision Shooting offers NO advantage over shooting un-modified brass. There, is that clear enough?
The method outlined in PS of inside reaming the necks of PPC brass serves ONE purpose, it gives a person another way to make brass that will fit in a rifle with a "tight neck." I submit that while it's not a GOOD way, IF one has a tight neck and needs brass, it will make case that will fit in the rifle. It will fit and will safely shoot...... regarding "the elimination of donuts" it is no more effective than outside turning. If your hedspace is short and you grease your rounds, yer still gettin' a donut. If your resizer's set too low, yer still gettin' a donut.
I decline to comment on Dr Subramainian's letter re the granular crystalline structure of brass and the efficacy of cutting it in certain ways "for strength" but I disagree with the entire final or conclusion paragraph of he article......and the points contained therein, individually.
There..... that oughtta' be plain enough to polarize the believers and unbelievers.
al
I'm an unbeliever.
Until someone explains how you can support a reamer to get it to cut a hole off center.... (the point here is to correct eccentric necks... it doesn't matter "how good the Lapua brass is.")
And until someone can explain to me how to set up and establish the outside diameter in relation to this reamer....
I'm an unbeliever.
I'm an unbeliever because I don't believe there's a gain to be had in smoothing up an off center hole in the interest of improving accuracy. Try this process with a long-range gun shooting VLD's......
Learn WHY necks get turned... it ain't to make them shiney and perty.....and it ain't to make then fit the gun.
As a backyard hack with a Harbor Freight lathe in his barn...... it is my opinion, from a machinists standpoint, that the purpose of a reamer is to clean up an established hole, PERIOD.....reamers are not designed to move holes over.
And if you DID support and preload one such that it actually corrected a hole two things are immediately apparent:
-#1, you're using the reamer as a single-point tool, not a reamer.
-#2, the hole would have to be well supported, not like a case neck.
AND........ the question must be asked,,,,,,,,corrected to WHAT???
Ohhh, and AJ300MAG, the writer of the article knows all this..... Page 58, second paragraph from the bottom the writer makes this statement.... "The reamer is held in in a full floating holder, allowing the reamer pilot to follow the inside diameter of the neck keeping the reamer from bell mouthing the neck of the case."
Just so's you understand..... "bell mouthing the case" means cutting a tapered hole.
UUhhmmmmm, it's cause by affixing the reamer, not allowing it to float. The process of correctly using a fixed reamer is too complicated to explain here, heavily dependent on preload and flex characteristics of both the tool and the workpiece.
It is my opinion and assessment that the method outlined in Precision Shooting offers NO advantage over shooting un-modified brass. There, is that clear enough?
The method outlined in PS of inside reaming the necks of PPC brass serves ONE purpose, it gives a person another way to make brass that will fit in a rifle with a "tight neck." I submit that while it's not a GOOD way, IF one has a tight neck and needs brass, it will make case that will fit in the rifle. It will fit and will safely shoot...... regarding "the elimination of donuts" it is no more effective than outside turning. If your hedspace is short and you grease your rounds, yer still gettin' a donut. If your resizer's set too low, yer still gettin' a donut.
I decline to comment on Dr Subramainian's letter re the granular crystalline structure of brass and the efficacy of cutting it in certain ways "for strength" but I disagree with the entire final or conclusion paragraph of he article......and the points contained therein, individually.
There..... that oughtta' be plain enough to polarize the believers and unbelievers.
al
