my .264 nitride Redding bushing is leaving my Norma PPC brass at .2632 after sizing,,after loading the necks are .2655 for a .268 neck chamber and shoots really well so far but was thinking about going to a .263 bushing since I am running a compressed load of 133 but I am not sure if I need a .262 to actually get down to .0025-.0030 tension??
how accurate are Redding bushings??
- Thread starter Eric Leonard
- Start date
Dusty Stevens
Shiner
None of the bushings are the correct size. Try a different one and try to not measure too tite on all that- calipers are fine for this measurement
Brians356
Silver $$ Contributor
"how accurate are Redding bushings??"
Not very.
I gauged a total of 17 bushings. Of the 8 TiN coated, all 8 gauged small, of the 9 plain ones 6 gauged small. Of the 17 bushings, only 3 gauged at nominal, and they happen to be plain ones.
My gages are the ubiquitous Vermont Gage class ZZ "Minus", meaning they are .0002" smaller than the nominal size. So if the .279 gage is a snug fit into a .279 bushing, it indicates the bushing is very close to its nominal size. If a .279 bushing will simply not accept a .279 gage, it means the bushing is at least .0002" small. Then if the next lower size gage, .278, is a snug fit, it suggests the bushing is very close to a full .0010" too small; but if it's a looser fit, it suggests the bushing is in the middle, or like .0004 to .0009" too small, and it becomes a feel thing to judge where it might fall.
If you happen to have more than one of a particular size bushing (say a plain and a TiN) it's important to always use the same one for a particular load to help ensure consistent neck sizing, as they're not likely to be identical just because they're marked the same size.
Not very.
I gauged a total of 17 bushings. Of the 8 TiN coated, all 8 gauged small, of the 9 plain ones 6 gauged small. Of the 17 bushings, only 3 gauged at nominal, and they happen to be plain ones.
My gages are the ubiquitous Vermont Gage class ZZ "Minus", meaning they are .0002" smaller than the nominal size. So if the .279 gage is a snug fit into a .279 bushing, it indicates the bushing is very close to its nominal size. If a .279 bushing will simply not accept a .279 gage, it means the bushing is at least .0002" small. Then if the next lower size gage, .278, is a snug fit, it suggests the bushing is very close to a full .0010" too small; but if it's a looser fit, it suggests the bushing is in the middle, or like .0004 to .0009" too small, and it becomes a feel thing to judge where it might fall.
If you happen to have more than one of a particular size bushing (say a plain and a TiN) it's important to always use the same one for a particular load to help ensure consistent neck sizing, as they're not likely to be identical just because they're marked the same size.
DeltaBravo
Gold $$ Contributor
You can get carbide bushings from Steve Theye at Benchrite in 1/2 thousandths. They ain't cheap, but the minor adjustability may be what you're looking for. A 0.2635 bushing may be what you want.
Dennis
Dennis
You can buy adjustable barrel laps and lap the steel bushings to size if you start with one that is too tight.
This web page shows you how to lap the neck of fixed FL dies but you can use the same process to lap the uncoated bushings to size.
You will need to buy a few gage pins for the range of bushings you are using and a good .0001 mike. If you are going to be serious in this kind of fun I would recommend that you eventually get a full set of pins from .061 to .250 and another set from .251 to .500 to check dimensions of chambers, dies and bushings. If you want to take a cheaper route you can buy a small hole gage and learn to use it with your mike.
If you have the desire for the ultimate in pins Deltronic makes small pin sets in .0001" increments. You pick the nominal pin and you get 10 pins in .0001" increments larger and 10 in .0001' increments smaller. But Deltronics pins are very expensive.
Most people would be well served with one of the $50 sets in .001" made in China that are found on ebay.
http://rickaverill.com/projects-past-and-present/lapping-reloading-dies/
http://www.deltronic.com/literature/Deltronic-Gage-Guide-2014.pdf
This web page shows you how to lap the neck of fixed FL dies but you can use the same process to lap the uncoated bushings to size.
You will need to buy a few gage pins for the range of bushings you are using and a good .0001 mike. If you are going to be serious in this kind of fun I would recommend that you eventually get a full set of pins from .061 to .250 and another set from .251 to .500 to check dimensions of chambers, dies and bushings. If you want to take a cheaper route you can buy a small hole gage and learn to use it with your mike.
If you have the desire for the ultimate in pins Deltronic makes small pin sets in .0001" increments. You pick the nominal pin and you get 10 pins in .0001" increments larger and 10 in .0001' increments smaller. But Deltronics pins are very expensive.
Most people would be well served with one of the $50 sets in .001" made in China that are found on ebay.
http://rickaverill.com/projects-past-and-present/lapping-reloading-dies/
http://www.deltronic.com/literature/Deltronic-Gage-Guide-2014.pdf
Last edited:
XTR
F-TR obssessed shooting junkie
If I recall correctly for my 308 I run redding bushings about .002 larger than I want my sized necks.
the guys in tool and die where I work have these pins they check wall thickness in extrusion dies they make,,I hadnt thought about it but I could take all the bushings I have to work and have 50 year die makers check the size on the bushings..
CustomReloadingTools
Site $$ Sponsor
the best way to measure the id of neck bushings is with a pin gauge, there are other methods but we feel using pin gauges is the most accurate. Each of the bushings we manufacture are pin gauged at least once if not twice before they are shipped. To be upfront we machine all our bushings a 1/2 thou smaller than the engraved size. We gurantee the accuracy on all our bushings, if anyone happens to get one that is out of spec we stand behind them with a 100% replacement gurantee. For anyone interested we sell our bushings direct thru our website and also thru Whidden Gunworks. www.CustomReloadingTools.com or www.whiddengunworks.com
Dusty Stevens
Shiner
Crt= best bushings by far
Brians356
Silver $$ Contributor
I have no problem with that, assuming you publish the fact, but I'm curious why you machine them .0005" smaller than engraved? (Guess: To account for spring-back?)
CustomReloadingTools
Site $$ Sponsor
Spring back is one of the reasons, the other is that we like to allow a little extra material to work with for the polishing process.
BTW-
I e-mailed CRT with a question and got a response within an hour.
Q- Will their bushings fit Redding Competition dies?
A- Our bushings are compatible with Redding, Whidden, Wilson, and RCBS bushing style dies.
I e-mailed CRT with a question and got a response within an hour.
Q- Will their bushings fit Redding Competition dies?
A- Our bushings are compatible with Redding, Whidden, Wilson, and RCBS bushing style dies.
pikespeakgoat
Gold $$ Contributor
+1, just recently purchased several and I'll be buying more from them.
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