Re-cap:
Above are first 3 feed dummies made by this dummy.
That Bertram brass has a rim diameter of 0.571".
Norma brass has a diameter of 0.574" which is very close to spec of 0.575" maximum, about .015" smaller than .416 Rigby rim diameter.
Parts is parts, the collection grew slowly over a 17-year period:
The dummy collection expanded.
I tried to resist, but I found a CZ .416 Rigby action that fed the dummies, all of them.
Never an over-riding of the rebated rim by the bolt !
So a reamer was ordered, to match a CIP chamber but with a wee bit of throat added:
And finally a barrel was decided upon, from McGowen, arriving in 2020, resistance was futile.
The Rigby bolt face is a loose fit on the .500 Jeffery rim.
Some of that improved brass with a bigger rim diameter sure would be nice.