9.3x62 dreaded brass doughnut ring

[Why not?]

Brass doughnut rings will develop through firings in chambers with excessive headspace, and subsequent full length resizing.

Set FL Resizing dies to size fired brass to have a slight crush fit. You will not have doughnut rings when doing so.

Ted

 

[dutch_m]

Brass doughnut rings will develop through firings in chambers with excessive headspace, and subsequent full length resizing.

Set FL Resizing dies to size fired brass to have a slight crush fit. You will not have doughnut rings when doing so.

Ted

ted,
are you talking to just neck size down to the shoulder , and not bump the shoulder

 

[Meroh]

24/64 = 3/8

I caught that too. LOL

Problem solved; 9.3 mm Metric Twist Drill Bit. Amazon:

 

[pathfinder76]

I didn't read entirely but did you full length resize agressivly? It might be the shoulders not pushed back far enough

You really should read entirely

 

[Denver Steve]

Buy an exact reamer

 

[Denver Steve]

In whatever decimal size you want. To the nearest thou on there.

 

[pathfinder76]

Creat positive headspace on the initial firing by creating a false shoulder. Try that with 3 cases, resize and see what that does.

You will need a 375 mandrel or expander ball to start the process.