Can I use Lapua brass with this 6.5X.284 reamer?

[BOB LEE SWAGGER]

Which 6.5X.284 brass can I use in a chamber cut with the attached reamer print?
Thank you in advance.

 

[/VH]

Bob,

I don't know the answer but my suggestion is for you to call the phone number on that print. In my experience with the folks at JGS, they have been very knowledgeable and helpful.

 

[Berger.Fan222]

It's more important that the reamer match the FL die.

 

[FatBoy]

The base looks right. Winchester brass is like .498" and you lose the pockets when you shot it in a Lapua /Norma chamber. I'll see if I can find one of my old Norma Match prints.

 

[dkhunt14]

It's more important that the reamer match the FL die.

That is not always true. Some brass is bigger or smaller in the back end. If you use the small brass in a big chamber you will lose primer pockets. If you use the big brass in a small chamber you will get bolt click and extraction problems. As an example Win brass in a WSM is smaller then Norma. It is enough difference to make trouble. A lot of Lapua brass is a different size also. Life gets easier when the reamer matches the brass and the die matches the reamer. Matt

 

[Berger.Fan222]

It's more important that the reamer match the FL die.

That is not always true. Some brass is bigger or smaller in the back end. If you use the small brass in a big chamber you will lose primer pockets. If you use the big brass in a small chamber you will get bolt click and extraction problems. As an example Win brass in a WSM is smaller then Norma. It is enough difference to make trouble. A lot of Lapua brass is a different size also. Life gets easier when the reamer matches the brass and the die matches the reamer. Matt

Good point. Thanks for clarifying.

 

[Milo 2.0]

It's more important that the reamer match the FL die.

That is not always true. Some brass is bigger or smaller in the back end. If you use the small brass in a big chamber you will lose primer pockets. If you use the big brass in a small chamber you will get bolt click and extraction problems. As an example Win brass in a WSM is smaller then Norma. It is enough difference to make trouble. A lot of Lapua brass is a different size also. Life gets easier when the reamer matches the brass and the die matches the reamer. Matt

Not really, most dies are sized under reamer specs. And if reamer matches brass, there'd be no room for growth of any kind.

 

[gunsandgunsmithing]

Which 6.5X.284 brass can I use in a chamber cut with the attached reamer print?
Thank you in advance.

Either, but that reamer is best suited to Lapua brass, by design.
That said, ideally the dies will also be designed with this in mind. A die for the smaller Winchester brass will size the Lapua brass from this chamber more than need be, creating shorter brass life and more frequent trimming.

 

[Scott Harris]

Here's the 284 WIN SAAMI drawing: http://www.saami.org/pubresources/cc_drawings/Rifle/284%20Winchester.pdf

Comparing this to your print:

.200 above the base, both prints show the same .501 dimension
Both prints also show .5042 at the base of the case.

So, it looks to me like the JGS reamer print follows the SAAMI spec and is using the minimum dimensions. Therefore, any brass that also complies with SAAMI should be perfectly suitable. Where's that "easy button."

 

[BOB LEE SWAGGER]

Thank you for the help!

 

[expiper]

OP,,,,that is a little big for my tastes,,,I like it around .4995-.5000,,,for Lapua and .497 for WW brass,,,the neck requires turning ,,,I like .298 for no turn,,,Roger