Expander dies

[wyosniper]

i have a 338 edge, and noticed a lot of my case mouths are out of round. I never have even worried about fixing them just ran them through my Redding full length die with a bushing, but they still are not straight. So I have heard of people using a expander die to uniform the case mouths back to round again and then resize. Could someone point me in the right direction on this and what size of expander mandrel to get, I know it's a 338, but do you get a mandrel that's oversized. thanks

 

[jarhead1077]

Sinclair Gen II Expander Die will handle all the way too .338. The turning mandrel for you would be .336 (0.002) sized under whereas the expander mandrel is .337 (0.001). I use this die with just a whisper of Imperial Dry Neck Lube with turning mandrel for all my calibers when new or smashed mouth. Polish mandrel after 50 pieces of brass with 800 grit.

 

[padom]

I use 21st Century Shooting TiN turning and expander mandrels.

 

[Milo 2.5]

If you are going to buy an expander die and mandrel, buy a carbide from PMA tool, no lube, also if you are going to add a step to your process, make it the last step with a undersized mandrel that leaves the correct neck tension you want.

 

[wyosniper]

Thanks guys found one gonna try it out, what's the best and easiest neck turner you guys run

 

[ZiaHunter]

21st Century makes an expander die for large cases such as the 338. Its what I use.

 

[black5.3]

Looking at starting this process too to make sure my neck tension is most consistent from one to the next... looking the the sinclair gen 2 and the 21st century ti ni setup.... if i go sinclair i will get carbide but dang its quite a bit more expensive than the standard steel.

 

[TripleBull]

Thanks guys found one gonna try it out, what's the best and easiest neck turner you guys run

If you buy the 21st Century neck turn lathe, you get two mandrels and an expander die. As Padom mentioned, get the TiN option.