Ok Gents,
I have a bit of an update on my die drama.
Just received a reply email from the manufacturer which took one whole month.

They say that all their (standard non custom) 470 Nitro dies produced AFTER 8-12-99 have been made to CIP drawing dimensions.
These have a case body length of 2.401" and a shoulder angle of 7 Deg 4 min.

Now here comes the interesting bit.
They have identified my 470 die set as being made in 1990 and that it is a standard, non custom set.

Their records show that my 1990 dies were made with a case body length of 2.570" and a shoulder angle of 14 Degrees!
THAT is a BIG difference!
2.570 inches and 2.401 inches!!!!

Now this means the shoulder ends up a long way forward (approx 160 thou) when using my die compared to their current die.

The old original Kynoch loaded rounds that I have show very similar dimensions to their current CIP dimensions, so why on earth did they produce dies with totally different dimensions to those of the original cartridge?

Why did it take untill 1999 to get the dimensions right on a cartridge which was designed pre 1910?

They have suggested that I could take the dies back to the place where I bought them and ask for my money back!
Yeah right!
The way I see it the manufacturer should at least replace the sizing die as it seems to me that THEY got the dimensions wrong in the first place.

Any advice on this one?