As far as what works, it will be on the target and maybe the concentricity gauge.
I don't know what the criteria are for dimensioning and tolerancing a die set.
The dies and the press interconnect via the threads(exception,somewhat,the "Co-Ax presses) As they are 60deg Vee threads, ideally the male and female pitch diameters would mesh in a co-axial fashion. Think of it as a helical 60 degree Vee block. I suspect hose two threadforms(male and female) use the pitch diameters as datums and tolerance size.squareness,coaxiality,etc from there. Depending on the manufacturer,some form of mandrel gauging likely takes place. Almost certainly at Redding, Who knows at Frankford.
We can have trouble when a "renegade" unauthorized datum steps in. What does that mean? A lock ring drawing down on the top of the press might not be perfectly square with the die body. Especially if its jammed to one side by a setscrew.
An out of square lock ring Might disrupt the male and female pitch diameters from "finding" each other.
The crossbolt lock ring will be superior to the setscrew lock ring that way.
The Forster/Bonanza press does not place the press 7/8-14 threads in a menage a trois with the die body and lock ring threads.
Its my opinion that whether or not an O-ring is beneficial??? You'd have to know what you were trying to accomplish, use a consistent technique,and test results.
With quality die and press components, there may not be a problem to solve,
A lock ring with runout might work like an out of square Garand bolt face ,
Folks figure out workarounds. Maybe an O-ring is a workaround for out of square set screw lock rings. The O-ring would let the thread pitch be "in charge" I don't know! Folks are trying.
Over time,some gun/reloading work has been done on a gang drill (multi station drill press) and some gets done on a jig borer. (Very precise)
For most folks its all good. Some folks can recognize and pursue that last 1/10th MOA. I'm grateful for what I learn from them. I read the same Precision Shooting O-ring article Uncle Nick did. Am I using O-rings? No.
I don't know what the criteria are for dimensioning and tolerancing a die set.
The dies and the press interconnect via the threads(exception,somewhat,the "Co-Ax presses) As they are 60deg Vee threads, ideally the male and female pitch diameters would mesh in a co-axial fashion. Think of it as a helical 60 degree Vee block. I suspect hose two threadforms(male and female) use the pitch diameters as datums and tolerance size.squareness,coaxiality,etc from there. Depending on the manufacturer,some form of mandrel gauging likely takes place. Almost certainly at Redding, Who knows at Frankford.
We can have trouble when a "renegade" unauthorized datum steps in. What does that mean? A lock ring drawing down on the top of the press might not be perfectly square with the die body. Especially if its jammed to one side by a setscrew.
An out of square lock ring Might disrupt the male and female pitch diameters from "finding" each other.
The crossbolt lock ring will be superior to the setscrew lock ring that way.
The Forster/Bonanza press does not place the press 7/8-14 threads in a menage a trois with the die body and lock ring threads.
Its my opinion that whether or not an O-ring is beneficial??? You'd have to know what you were trying to accomplish, use a consistent technique,and test results.
With quality die and press components, there may not be a problem to solve,
A lock ring with runout might work like an out of square Garand bolt face ,
Folks figure out workarounds. Maybe an O-ring is a workaround for out of square set screw lock rings. The O-ring would let the thread pitch be "in charge" I don't know! Folks are trying.
Over time,some gun/reloading work has been done on a gang drill (multi station drill press) and some gets done on a jig borer. (Very precise)
For most folks its all good. Some folks can recognize and pursue that last 1/10th MOA. I'm grateful for what I learn from them. I read the same Precision Shooting O-ring article Uncle Nick did. Am I using O-rings? No.
