Dave, I use the No 6   I have an 8″ radius on the blade / Iron and it works great.

I don’t have the Veritas but do have a Keen Kutter K6 and a Sargent and use my #6’s for a smaller jointer plane, never really gave it a thought to use as a Jack Plane.  If it works for you why not !

Steve

Dave, I Bought a new blade and they put the radius on the blade for me, as I don’t  have a grinder and it would take forever by hand. There is some info here ……..http://toolsforworkingwood.com/store/blog/269

I hope it helps.

A mill file would work, although I’d tend to use a double cut flat file.  Cambering  is also possible using an extra coarse diamond stone if you have one.  An 8″ radius isn’t too much metal removal across a 2″ iron, as it works out in the region of 1/32″ of metal to remove at either side of the iron and arcing to zero at the mid point/centre.

A quick double check using dividers or compass on paper should confirm this and you can create a template – if desired – and superglue this to the blade being ground.  The template can be removed using acetone once you’ve obtained the desired radius. 😉

Hi , again , @Dave : as I’m posting , I see you’re on the line .

In my pursuit for happiness (read a # 5 jack plane) , I found the attached data.

Instead anything better  , this might be a (good) starting point.

Please double check the values – I cannot be sure about , but I use -them as reference.

Thanks to every-one for corrections .