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Bushing Size Results ?

Varmint Hunter

Varmint Hunter

Well-Known Member
Joined
Dec 26, 2001
Messages
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Location
Long Island, New York
Working with a new set of Redding bushing dies and ran into an interesting problem. Loaded round neck diameter is a consistent .313". I used a .311" Redding TN bushing in the Type S die to resize some once fired Peterson cases. The brass necks measured a consistent .308" when removed from the die. FWIW, I was using Imperial sizing wax.

I rechecked everything and measured with a different caliper but got the same results. While it is difficult to measure the inside diameter of a bushing with a caliper, I do get a measurement of .308", give or take. Has anyone else had a similar experience with a bushing? It appears that the bushing is mismarked.
 
IMG_4561.jpegIMG_4562.jpegI went up and sized a case, Peterson 7prc brass , Whidden neck bushing die, Whidden.311 bushing, no expander ball. .03185 case has 5 firings on it, annealed each time it's loaded
 
Sizing down more then .008" in one step, may make neck OD smaller then bushing marking.

Your fired brass @ .315" sized with a .311" bushing should work.
Do double check Outside Diameter measurements of fired & sized brass necks.

Test. The hole in the die that the neck passes thru may be undersize??
Take a fired brass that measures .315" Run into die with bushing & expander removed.
Has neck diameter changed?
 
243winxb said:
Sizing down more then .008" in one step, may make neck OD smaller then bushing marking.

Your fired brass @ .315" sized with a .311" bushing should work.
Do double check Outside Diameter measurements of fired & sized brass necks.

Test. The hole in the die that the neck passes thru may be undersize??
Take a fired brass that measures .315" Run into die with bushing & expander removed.
Has neck diameter changed?
Click to expand...

If you remove the bushing, the neck will make no contact with the die.

I suspect the bushing is actually a .308" and not a .311, as indicated. I've got another bushing ordered. These TN bushing sure have gotten expensive.
 
Asking if I have received bushings that are not the size that are marked on the bushing, yes . I tend to order 1 size small then I think I need. The mandrel will give the final Id- Od .
Hope this helps. 🎅
 
Varmint Hunter said:
Working with a new set of Redding bushing dies and ran into an interesting problem. Loaded round neck diameter is a consistent .313". I used a .311" Redding TN bushing in the Type S die to resize some once fired Peterson cases. The brass necks measured a consistent .308" when removed from the die. FWIW, I was using Imperial sizing wax.

I rechecked everything and measured with a different caliper but got the same results. While it is difficult to measure the inside diameter of a bushing with a caliper, I do get a measurement of .308", give or take. Has anyone else had a similar experience with a bushing? It appears that the bushing is mismarked.
Click to expand...
I stopped using redding bushings years ago because I found actual measurement didnt match the stamped on dimension. I also found a number of them did not have the holes centered. Ive changed to SAC bushings and am happy with them. I also found Wilson and RCBS bushings of good quality
 
Seabeeken said:
I stopped using redding bushings years ago because I found actual measurement didnt match the stamped on dimension. I also found a number of them did not have the holes centered. Ive changed to SAC bushings and am happy with them. I also found Wilson and RCBS bushings of good quality
Click to expand...
This. This is the best answer in this thread.
 

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