Originally Posted by James Jones
I assume that your talking about the 416 Rigby case?
The 338 Lapua is based off of the 416 Rigby case , not sure what all changes were done to it but I don't think you would gain anything by necking down the 416 case to 338 rather than going witht he 338 Lapua or the improved version
I examined the same thing because a friend has a 338-416 IMP Reamer.
to much like hard work!! Dies, load data etc Lapua has done it all for you even as 300 Lapua.
Unless that type of build smokes your tyres, then do it.
All the best,lets us know how it all goes.