7WSM - 7mm/300 questions

[Fire306]

I am looking to build a 7WSM, I have the donor rifle, dies (7WSM Redding) 270 Norma brass to form.
My gunsmith doesn't have a regular 7 WSM reamer on hand. He has a 7/300 and a 7WSM tight neck reamer.
I'm not opposed to using the 7 WSM tight neck reamer, but would prefer to have a regular 7WSM.
My question is, if I was to use the 7/300, what do I use for dies?? I am assuming it isn't possible to use my 7 WSM dies, as the shoulder of a 7/300 WSM is further setback than a 7 WSM.
I'm thinking I will just have him order me a 7WSM reamer.
Any input would be appreciated.

 

[RDavies]

With a 7mm/300WSM you use a 7WSM seater die and a 300WSM FLS die with a neck bushing to suit 7mm

 

[Lbart]

Fire306,
I have shot the 7/270 WSM for the last 3-4 years and done quite well with it. I use a Redding 270 WSM FL S- die to resize and a Micrometer Redding seater in 7 WSM to seat my bullets. I use Norma 270 WSM brass, H-4331sc powder, Wolf standard primers and Berger 180 Hybrids. As Ron Davies says a 300 WSM FL bushing die will work also, as will 300 WSM brass. A 7/300 WSM reamer is just another name for the same thing as a 7/270 WSM. You should be OK using it.

Hi Ron...will I see you in Ottawa in 2017?

 

[RDavies]

Fire306,

Hi Ron...will I see you in Ottawa in 2017?

I hope so. My 7mm/300WSMs (or 7mm/270WSM) have been going much better lately.
Regards Rod