Eagle27,
Yes I was just commenting in general about belted cartridges as even they work OK so a rebated rim should not be overly problematic.

Personally the ballistics of the 404J are better suited as I do not need anything more than this. I was just put off by the fact that it appears that significant work is required so I was contemplating the 425WR as it looks like I can minimise the work somewhat.

Mods for 404J
1)Magazine
2)Rear of action and posible front of action opened up
3)Feed ramp
4)Feed rails widened
5)Possibly ejector box mods/relocation

Mods for the 425WR
1)Feed ramp
2)Feed rails widened

Magazine should be OK as it appears only a smidge longer than the 9.3x62mm.

Comparing the OAL of the two it appears the 404J is a bit over 5mm longer.

How has your standard mag been lengthened.

Cost of doing the work is one thing, but in my mind, evertime something is modified, the reliability (and strength) can be effected.

Its very early stages for me on this one, so I can go either way (or even something else)

George