Expanding die for 300 Blackout

[Rich22]

Have been looking today for a M die for the 300 blackout and cannot find one listed anywhere, talked to Midway and they were no help. I see many 30 Caliber cartridges listed for it but not the 300. Since going to be loading oversized cast what is the best way to accomplish this? I thought I would just grab one of the Lyman's and be done with it but that is proving not the case.

Thank you

[Frozone]

There are only 2 sizes.
You want the 'Long' 30 cal, for short cases. So don't get the one for 30-06 ect.
Or you can buy the 'Short' one and get the extra piece from Lyman for ~$3.
Just tell em you ordered the wrong one by mistake. DAMHIK

[Mike Hughes]

I chose the rcbs expander. It is similar to the M die, but I think there may be more sizes to pick from. For my 300 blk, I size my boolits at .311, I use the rcbs expander with a .310 insert. It expands the neck and bells the mouth to where the boolit will seat without swaging down the lead. Works great,
http://www.midwayusa.com/product/745616/rcbs-neck-expander-die-310

[Mike Hughes]

I just noticed they are special order at Midway. Grafs has em in stock for $26.99 with free shipping
http://www.grafs.com/retail/catalog/product/productId/13751

[Jailer]

I use a Lee 9mm die body and a 30 luger expander plug with my Pro auto disk. Works great and I can expand and drop powder in one step. It's a drop in replacement. You have to set the die high in the press but it works well.

I got the 30 luger expander tip from another member on this forum.

[BK7saum]

If you get the m die get the 31 or 31r expander. It measures 309 or so. The regular 30 expander is about 307

[Rich22]

Excellent, and I assume this version will be listed on the page that describes the die or is this a special order item?
If you get the m die get the 31 or 31r expander. It measures 309 or so. The regular 30 expander is about 307

[Moonie]

I've used the 30 carbine lee powder through expander insert in both 45 Colt and 357 Magnum expander dies for my 300 loading. Had to setup my other progressive for 45 Colt so used the unused 357 set in its place and it worked just fine.