Necking down

[kochie]

What bushing are you guys using necking down the 6.5 lapua down to 22 CM I have a 255 neck .

 

[RegionRat]

Better to start from Lapua 6 CM than to go from 6.5 CM down to 22 CM.
Far less brass flow starting from 6.

Better yet is to just buy 22 CM brass from Alpha or Peterson, where you have a choice of LRP or SRP. YMMV

 

[kochie]

What bushing are you guys using necking down the 6.5 lapua down to 22 CM I have a 255 neck .

Well your right but try to find 6 CM brass ?? I would like to stay with lapua brass .

 

[Coyotefurharvester]

Are you turning the necks?

 

[kochie]

Are you turning the necks?

Yes I am 255 chamber

 

[Coyotefurharvester]

What are you turning the necks to(thickness)?

 

[Eagle Six]

Are you turning necks to uniform the thickness (skimming), or to reduce the thickness, or some other reason?

 

[kochie]

Yes I am 255 chamber

Are you turning necks to uniform the thickness (skimming), or to reduce the thickness, or some other reason?

Just skimming thinking ending up at around.012 but would have to go down stairs and check for sure

 

[ArtinNC]

I'd use a Redding trim die to neck down .

 

[kochie]

I'd use a Redding trim die to neck down .

I guest I never have I’m not sure how a trim die works can you explain? I’ve always used bushings In Redding dies .

 

[Coyotefurharvester]

.012x2 + .224 =.248 0.007 under your chamber neck. Next question how much neck interference fit(neck tension) ? Certainly plenty of neck clearance. Do you have any bushings that maybe in play?

 

[kochie]

.012x2 + .224 =.248 0.007 under your chamber neck. Next question how much neck interference fit(neck tension) ? Certainly plenty of neck clearance. Do you have any bushings that maybe in play?

Yes 3 to 3 1/2 thousand per side I have to remeasure my brass to be sure yes I got bushing’s yes .

 

[Eagle Six]

To your original question I think @ArtinNC has a good answer/suggestion for necking down your brass.

Other than skimming the necks it doesn't appear you need to trim to fit your chamber neck size. When when forming 22CM from 6.5CM do the cases have a tendency to form donuts, although that may not be a concern? I do not have any direct experience with 6.5CM Lapua brass to measure it and have never had a 22CM.

 

[kochie]

To your original question I think @ArtinNC has a good answer/suggestion for necking down your brass.

Other than skimming the necks it doesn't appear you need to trim to fit your chamber neck size. When when forming 22CM from 6.5CM do the cases have a tendency to form donuts, although that may not be a concern? I do not have any direct experience with 6.5CM Lapua brass to measure it and have never had a 22CM.

I guest what I’m doing is just cleaning up my necks to be more concentrate .

 

[kochie]

I guest what I’m doing is just cleaning up my necks to be more concentrate .

After rechecking my brass it’s around .014 so I’m at .252 so 1/12 thousands per side . Thanks for all your help I think I’m good.

 

[Coyotefurharvester]

So based on your numbers have you made a bushing size choice?

 

[kochie]

So based on your numbers have you made a bushing size choice?

Yes sir

 

[kochie]

Yes sir

To neck down to 22 from 6 CM if I remember right I used 3 bushings.

 

[ArtinNC]

I guest I never have I’m not sure how a trim die works can you explain? I’ve always used bushings In Redding dies .

A trim die is made to put your brass in and file it to length , I have never used it to trim brass . But it works great as a form die , they are a little big on the ID so they will have to be run thru a Full Length die after . And I think a trim dies are cheeper .

 

[kochie]

I

A trim die is made to put your brass in and file it to length , I have never used it to trim brass . But it works great as a form die , they are a little big on the ID so they will have to be run thru a Full Length die after . And I think a trim dies are cheeper .

ok thank good information