lyle2231
Well-Known Member
Inquiring if anyone else had this happen? ….. I measured a neck bushing internal diameter on a couple of bushings, I found a .246 marked bushing measuring.243. Found a .256 @ .253. Anyone else make the same discovery?
Bushings, pt deux
- Thread starter lyle2231
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Rick Richard
Well-Known Member
What kind of measuring device did you use?
lyle2231
Well-Known Member
Calipers, digital
Rick Richard
Well-Known Member
May not be as accurate since the jaws although very small may cause a deviation as compared to instrument designed for curved surfaces.
jimbires
Well-Known Member
I randomly picked out 5 different bushings . my bushings are all Redding . I measured them with pin gauges . I could not get the corresponding pin gauge to go in . .001 smaller pin gauge did go in , but it was a smidge loose .
I think you'll have a hard time measuring this small of a hole with a caliper . it's the wrong tool for the job .
I think you'll have a hard time measuring this small of a hole with a caliper . it's the wrong tool for the job .
ShtrRdy
Well-Known Member
You need pin gauge to measure these properly.
I had a similar thing happen with a CH4d bushing. It was supposed to be a .287 bushing but the sized neck diameter ends up .283.
I haven't checked the bushing with a pin gauge yet. I need to buy a set.
I haven't checked the bushing with a pin gauge yet. I need to buy a set.
lyle2231
Well-Known Member
Not having access to pin gauges I used what I have. I wanted to find out if I had a one off anomaly. Hopefully my OP will pique a few more gentlemen's interest.
LRHNTR
Member
Just buy a couple pin gauges, they are only a few bucks on Amazon!
bigngreen
Well-Known Member
Odd of both being of exactly the same is slim, Im thinking it's withing the capability of the measuring tools. There will be tolerances to these too, they won't be to the tenth.
lyle2231
Well-Known Member
So would it be fair to say if you wanted a.244 neck bushing/sizer buy a .247?
I have found a lot of variance in Redding tiN bushings. I've switched over to whidden bushings and have been pretty happy. That being said I've also found that the finished neck doesn't always correspond with the bushing size depending on the caliber and how much you are sizing down. It's still a guesstimate until you actually try it and measure the finished neck.
A .xxx bushing will not fit in a .xxx hole. The pin must be smaller than the hole, to fit.
To properly measure the bushings you need an inside micrometer, but you'd be wasting your time. I've never had a bushing come in more than .0002" outside of what was claimed and I measured about 40 one day when I was bored and sorting them.
To properly measure the bushings you need an inside micrometer, but you'd be wasting your time. I've never had a bushing come in more than .0002" outside of what was claimed and I measured about 40 one day when I was bored and sorting them.
