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6.5 to .338
- Thread starter RCMSTER
- Start date
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Honest question
According to diagrams, the 6.5 prc is .015 longer, so would it in fact, come up short?
laker
Well-Known Member
- Joined
- Dec 9, 2017
- Messages
- 1,635
If I had a 338 die I could expand a neck and see how much shrinkage it has. But I'm betting I'd have to go up in steps
Yes, I plan on going up in steps if I decide, or if someone that's done it tells me it's possible or feasible.
It can be done but you'll need several mandrels to do it.do you have an annealer?
I anneal my brass, but just not with a fancy annealing machine.
I have a K and M tapered mandrel that works on 6 BR brass to make 30 BR in one pass, a .065" difference . Perhaps there is one you can get that would work in one pass. Difference is .056"
I would call this company and ask if their 338 mandrel would work.
If not, then you will have to go with a few mandrels as already mentioned.
I would call this company and ask if their 338 mandrel would work.
Neck Expanding Mandrel - Stainless Steel
Our Neck Expanding Mandrels are designed to fit both the 21st Century Shooting and Sinclair Expander Dies. Our mandrels are longer than other expanding mandrels and feature a special dual taper which expands both on the up and down stroke of the press to more uniformly expand and straighten case...
www.hoplon.com.au
If not, then you will have to go with a few mandrels as already mentioned.
That just might be what I need. Do I need a special die to go along with that mandrel, or how does that work?I have a K and M tapered mandrel that works on 6 BR brass to make 30 BR in one pass, a .065" difference . Perhaps there is one you can get that would work in one pass. Difference is .056"
I would call this company and ask if their 338 mandrel would work.
Neck Expanding Mandrel - Stainless Steel
Our Neck Expanding Mandrels are designed to fit both the 21st Century Shooting and Sinclair Expander Dies. Our mandrels are longer than other expanding mandrels and feature a special dual taper which expands both on the up and down stroke of the press to more uniformly expand and straighten case...www.hoplon.com.au
If not, then you will have to go with a few mandrels as already mentioned.
Shane Lindsey
Well-Known Member
- Joined
- Jul 13, 2010
- Messages
- 3,893
When making my 338 Sherman brass I:
280ai graphite necks and wipe off outside
Run it in a 338 die to expand the neck.
Graphite and wipe off outside
Run it in a 35 Whelan die to expand neck.
Anneal
Lube cases and run it into the 338 die about 2/3 sized leaving a false shoulder. (You will have to do this in increments to find the right crush fit until the bolt closes with slight pressure).
Seat bullet to .010" jam with about starting powder load
Size, trim, and chamfer
You may need to trim before running it into either of the following after initially expanding the neck depending on how long it is.
280ai graphite necks and wipe off outside
Run it in a 338 die to expand the neck.
Graphite and wipe off outside
Run it in a 35 Whelan die to expand neck.
Anneal
Lube cases and run it into the 338 die about 2/3 sized leaving a false shoulder. (You will have to do this in increments to find the right crush fit until the bolt closes with slight pressure).
Seat bullet to .010" jam with about starting powder load
Size, trim, and chamfer
You may need to trim before running it into either of the following after initially expanding the neck depending on how long it is.
That's kinda the process I was thinking about using to see if it would work. Does the graphite work better than, say, a spray on liquid neck lubricant.
i am not a fan of sprays. graphite has been my preferred method for years, but you can try the spray and if things don't work out then you can get powdered graphite at any local auto parts store.
