338 wsm made with neck reamer

[TheDugg]

Im having a 338wsm built. 300 wsm reamer and 338 neck. I saw Redding 338wsm dies and also Rcbs dies, but will it work? I dont know the dimension of the 338 neck reamer for the chamber, dont know the measure of the dies. Im gonna use Norma 300 brass to neck up.
Or is it better not to chance on the 338 dies and build a bushing die out of 300 wsm dies?

 

[Rdlningcltchdmpr]

325 wsm is probably what you're gonna want.

 

[Rdlningcltchdmpr]

.338 "chamber = 308 bullet +.013" brass thickness. .338" bullet + .013" brass thickness = about a .368 " chamber size. For no neck turn loads.

 

[TheDugg]

Ok thank you. When I measure my 300 norma brass with a 338 bullet in the neck size is .370 -