Creating tight neck brass for a factory chamber

[boomtube]

Re: Creating tight neck brass for a factory chamber
Different folks, different results. And just the learning is worth something it seems. Or, we could all just buy Laupa cases? (Which also will have to be annealed from time to time, even it's not immune to work hardening, or is it?)

The simplist method to insure minium working of the cases is (1) neck size with a Lee Collet Neck Die, and (2) use a shoulder bump die when chambering gets difficult. Seems simple to me but,...?

[boomtube]

Duplicate post...

[VON GRUFF]

[quote=Alaskan338Lapua; So here's my plan. I have a factory rifle with a factory chamber in 308 win. Now suppose I reformed 30-06 into 308 win and reamber the inside neck and then took some measurements and trinmmed the outside neck then voilla! custom fitted 308 win brass! has anyone else done something similar? As far as chamber measurements are concerned how accurate is a cerrosafe casting?[/quote]

As has been said it should be at the end of a long line of improvements,BUT take no notice of those who would disuade you from this learning process. I have gone down the same road with my 7x57 with the added quirk that the 7x57 has a 3 thou tapered neck. I used 5.56x57 cases that have a .028 neck wall thickness and I have been able to get the necks to .0185 for a .0005 clearance release on the mouth but the taper gives me an incremental release clearance to half the neck length as I use the Wilson neck dies. I did get a snug chamber cut when I built the rifle although it will still chamber factory (shudder) if necessary. It is a facinating part of our past time-obsession and so long as you keep meticulous measurements and records, have at it with coution and enjoy the heck out of it.

Best wishes, Von Gruff.

[Alaskan338Lapua]

Thanks VG, the experiance of forming, measuring, trimming, reaming and the associated tasks is definatley a good learning experiance. All in all I'm not shooting a BR match with this rifle. it comes down to pride in ownership and pride in the work accomplished. Reloading is one of three hobbies that I get enjoyment out of. Sometimes on a -60 degree day with only four hours of daylight there's nothing to do but kill allot of time at the table tinkering around. I'm going to start work, thanks for the advice fellas-338