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Case neck turner,suggestions please.

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Unread 03-23-2007, 08:56 PM
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Re: Case neck turner,suggestions please.

It is a waste of time to turn Lapua cases.

Enjoy them as they are.

[/ QUOTE ]

Every piece of each caliber of Lapua brass is not perfectly or acceptably concentric. I have several thousand pieces and I haven't found any yet that I would just ingnore and use them in matches or hunting situations that I am involved in. If you are spending hard earned funds to shoot competitively or to push the envelope of your hunting abilities, getting the brass concentric is not a waste of time. If you applied that same principle while running through doors, you would tear up your shoulders on the door jambs!

Simply put, there is more to benefit (improving skills and performance) by getting them concentric that there is to gain by ignoring the cases. If you take cases with zero runout and cases with .002" runout and shoot them at say 900 yards, you will see a drastic difference. On the other hand, if you are not pushing the envelope on range or have the need for extreme accuracy, ignore the case necks as it won't matter. Personally, I would not spend my time and money to travel to events and hunts with faulted ammo.

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Unread 03-23-2007, 09:51 PM
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Join Date: Sep 2004
Location: on the rifle range in Utah
Posts: 2,704
Re: Case neck turner,suggestions please.

NH and Chawlston,

I couldn't agree with you guys more. Lapua is NOT PERFECT! I have seen it be worse than american brass in neck wall thickness consistency, case head squarness, primer pocket uniformity and more. Heck, just today I squared the case heads on a whole batch of Lapua 220 russian brass and 100 of 100 had dome shaped heads that were not flat or square.

And Norma is no better. Seen it vary a lot in neck wall thickness.

The advantage of this foreign "holy" brass (meaning Lapua) is that it is so damn hard that the primer pockets will last a lot longer and the flashholes USUALLY are better with burrs but they still got 'em! But the foreign stuff is usually dimensionally better so maybe there is another small advantage there.

No one on earth and I mean no one has had more experience turning necks than 7mmrhb and he'll tell you the same thing. He has turned over 11,000 pieces of brass to date of all kinds and calibers and all brass sucks. If it has to be perfect then it has to be made that way by hand.

Will it help with a hunting gun? No doubt that banged up old Winchester brass with no tweaking can kill a deer. But how far? If you plan to hunt long range, you have to make your ammo capable of long range so everything helps in my opinion.

For neck turners, I use a Sinclair as does 7mmrhb but we both wish we had K&M mandrels and cutters. Won't be long 'till we aquire some I'm sure. [img]/ubbthreads/images/graemlins/wink.gif[/img]
Find it
Range it
Click it
Pull it
Dump it

If it's not far, it's boring.
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Unread 03-23-2007, 10:51 PM
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Join Date: Jan 2005
Posts: 338
Re: Case neck turner,suggestions please.

Johnalan, the Sinclair turning mandrels have problems with Q.C. It's an on going frustration to get mandrels that are small in the middle or bigger on one end or the other. Cut adjustments aren't as easy as the K+M either. --RHB
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Unread 03-23-2007, 11:22 PM
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Join Date: Jan 2005
Posts: 338
Re: Case neck turner,suggestions please.

The 6br brass from Lapua is pretty hard to beat for uniform neck wall thickness. I think .0005" to .0007" is about average. Some lots are as little as .0002". But the case heads are a whole different story!! The only thing touching the bolt face is the rim of the primer pocket.

The last three lots of Lapua 6.5-284 brass were worse in neck uniformity than any Rem. 300 RUM brass I've ever turned!! ( just under .003" Side to side ).GG and I agree that when someone calls Lapua brass GREAT brass, they actually mean that they can run super high preassure without the case failing or blowing primer pockets loose.

I guess I just find it hard to shoot brass that I know has problems without trying to do something about those problems!!---RHB
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Unread 03-24-2007, 02:25 PM
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Join Date: Oct 2004
Posts: 723
Re: Case neck turner,suggestions please.

Ok just a question regarding turning neck cases.-

If you use a redding fl <die with a bushing and eliminate the expander, I guess you need to use a mandrel to get the "bumps" to the OD of the neck??

And do you neck turn once and then a second time after firing the cases??

I´ve used a Forster neck turner on 7rm cases, but it seems to be a little inconsistent.-
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Unread 03-24-2007, 06:44 PM
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Join Date: Dec 2006
Posts: 308
Re: Case neck turner,suggestions please.


It's been my experience that a donut will form on the inside of the neck towards the bottom if you use the redding dies w/bushings. Since not all the neck is resized there ends up being two thicknesses. This eventually ends up on the inside of the case and then you have inconsistent neck tension which directly effects SD and ES. Get a k&m tool with the carbide cutter for your caliber. Once you take the donut out you only have to clean them up every once in a while since the neck gets thicker every time you fire.

Read this ...
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Unread 03-25-2007, 12:52 PM
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Join Date: Jan 2005
Posts: 338
Re: Case neck turner,suggestions please.

alg, I always use a full length die with expander ball to prep cases for turning. Then the expander mandrel is used to get the right I.D for the turning mandrel.

A bushing die will not size the entire neck as Cruizin mentioned, and the expander mandrel alone doesn't make the I.D. as uniform as is preferred.

I don't turn the necks again after being fired once. Many guys do this, but it's usually their own brass for their own gun.Probably a practice for the most anal of the B.R. PPC guys. After I hand off the brass I turn, I generally don't see it again. After several firings the necks will become thicker and a little clean up turning would be best.
I've never used a Forster turner so I can't comment on their ability to produce a consistent neck thickness.

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