Reamer specs for a straight 284 no turn

[Jon faustino]

284 reamer help with laupa brass and 184 berger hybrids any help would be appreciated

 

[Tommie]

Long or short action?

 

[Jon faustino]

Single shot prone rifle .

 

[F Class John]

No turn can be anywhere from a .317 to .321 neck and at least .220 freebore. I like a .501 .200 line as well but that’s me.

 

[Bamban]

Here is one DK @ PTG.

 

[KenOath]

.501” at .200”, .319” neck, .220”- .235” FB.. Should get good results.

.2846”-.2848” FB diameter won’t hurt either..IME at least.

 

[LA50SHOOTER]

I'm having one done right now by JGS. - I submitted a dummy-round with the new Lapua 284 Winchester brass and the brass measured 0.4985 (+ - 0.0005) at the 0.200 line on numerous samples from a 200 round same lot batch. - I'm still waiting to confirm & approve the drawing that they'll grind the reamer to.
I'm with @Rushty on the dimensions except I'll probably have a .250 - .260 free-bore on the one I've spec'd as I set the 180 gr. VLD out a bit. (Lower bearing surface is 2/3rds of the way in the neck above the neck / shoulder junction).

 

[NV_Dmax]

You can call JGS and they will make this exact reamer if you want. It works pretty good.

 

[Jon faustino]

You can call JGS and they will make this exact reamer if you want. It works pretty goodView attachment 1260696.

Thanks for your help !

Regards,
Jon

 

[KenOath]

You can call JGS and they will make this exact reamer if you want. It works pretty goodView attachment 1260696.

For heavies from 180 to 184 no turn this print will do it all... JGS cut a very nice reamer..

 

[Kracken McGraw]

You can call JGS and they will make this exact reamer if you want. It works pretty goodView attachment 1260696.

Is the freebore the .2300 number or the .2482? Thanks!

 

[F Class John]

Freebore on that print is .230

 

[NV_Dmax]

Is the freebore the .2300 number or the .2482? Thanks!

.230"

 

[Kracken McGraw]

.230"

Thank You!

 

[GregC]

What is the outside loaded diameter with the new 284 Lapua brass? TIA

 

[XTR]

What is the outside loaded diameter with the new 284 Lapua brass? TIA

I'm sort of interested to see an answer from someone who actually loads the 284s, I don't; however, I'll go out on a limb and put the loaded neck diameter at about .312-.313. This assumes a ~.014 neck thickness and a .284 bullet.

Necks on my 7-08 and 308s from Lapua are usually .014 to .0145

I've seen .317 referenced on a number of occasions for 7mm reamers. My 7-08 reamer is a .317.

 

[F Class John]