Bushing dimensions

[UndFrm]

Wanting to compare a 6mm neck bushing to a 7mm neck bushing. Are the outer diameters of the 2 the same? How about the height of the 2 bushings?
Asking this because I was wondering if I can throw a 7mm bushing in a 6.5prc die to size the neck?

Thank you

 

[WSnyder]

Height and OD are the same between the bushings. It is very common to do what you want to do. Before the 6.5 GAP had it's dedicated dies everyone used 7 RSUAM dies with the appropriate bushing. Many more examples out there like the CM family. 6.5CM dies with a smaller bushing for 6CM and 22CM.

The only hiccup you may face is you are wanting to go bigger. Sometimes the hole in the top of the shoulder, bottom of the neck in the die is too small and has to be opened up when going larger.

What brand die do you have? Maybe someone with same can tell you if it's large enough.

 

[UndFrm]

Height and OD are the same between the bushings. It is very common to do what you want to do. Before the 6.5 GAP had it's dedicated dies everyone used 7 RSUAM dies with the appropriate bushing. Many more examples out there like the CM family. 6.5CM dies with a smaller bushing for 6CM and 22CM.

The only hiccup you may face is you are wanting to go bigger. Sometimes the hole in the top of the shoulder, bottom of the neck in the die is too small and has to be opened up when going larger.

What brand die do you have? Maybe someone with same can tell you if it's large enough.

I don't have 1 right now but I do have someone selling a Forster and a Whidden Full Length bushing die.

 

[243winxb]

https://patents.google.com/patent/US5649465

I use Redding.
How the bushing sizes may be different between brands? The Wilson instructions claim a taper of .003" built into the bushing.

How are L.E. Wilson Inc. Bushings Different?
Reloaders who want a firmer grip on the bullet or who have harder brass in springing back more would select a smaller bushing. We
make our bushings in .001” increments. The size marked on them refers to the middle of the bushing, which is *reamed with a .003”
taper*. Since the case neck only reaches the middle, a slightly tighter sizing can be achieved by turning the bushing over, with the
marking facing toward the case or down inside the bushing. This is mainly an emergency step to be taken if the brass has hardened,
springing back more, and will no longer hold the bullet; or for fine-tuning the sizing to provide less additional “squeeze” than using the
next smaller bushing in the normal way.

Redding bushings get installed with the size stamping, down. No taper like Wilson.

 

[SeabeeKen]

Forster bushings are different than the others. They have a taper on one end and will only work in the Forster die. Redding, Whidden, Wilson, RCBS, SAC are all interchangeable

 

[243winxb]

The only hiccup you may face is you are wanting to go bigger. Sometimes the hole in the top of the shoulder, bottom of the neck in the die is too small and has to be opened up when going larger.

Very true.

My 243 Win Redding, with no bushing, will size a larger 308 Win neck smaller.

After many firing, the unsized part of the case neck will cause drag, when closing the bolt. A tiny bit more effort to lock the bold down. Mostly a non-issue.

The unsized part of the neck, centers the bullet in the chamber. Seems to help factory chambers. Takes 3 firings.

 

[chromatica]

I made a 7 PRCW die just as you described. I purchased a Wilson 6.5 PRC die and put a 7mm bushing in it (.310 as I remember). I did open up the throat of the die with a 5/16 drill bit.

 

[UndFrm]

I made a 7 PRCW die just as you described. I purchased a Wilson 6.5 PRC die and put a 7mm bushing in it (.310 as I remember). I did open up the throat of the die with a 5/16 drill bit.

Would you know which brand of bushing did you use?

Thank you

 

[chromatica]

Would you know which brand of bushing did you use?

Thank you

Yes, I bought an LE Wilson bushing.

 

[chromatica]

The 7 PRC rifle is still on the drawing board - I have an action but no barrel yet. When I take my first shots, it's possible that the expanded necks won't fit through the die I have modified with a 5/16 inch drill bit. If that happens, I will open it up further with an 8mm bit. (I have a Jet standing drill press and a special vise for securing round stock. I bolt the vise to the drill table after getting everything centered. I wouldn't suggest doing this with a hand drill.)

 

[RabbitSlayer]

Fclass john just did a video on this on ultimate reloader like a couple days ago. All steps to go from 6.5 prc to 7 prcw with rcbs dies.