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Hunt
09-28-2014, 2:46 PM
somewhat new to all this, need a recommendation for the best die for making 308 to 7-08? Will I need to turn / trim the necks?

Witch Hunter
09-28-2014, 6:22 PM
Yes, you will need to turn the necks as they will be thicker. You will also need to trim to length. The extra brass has to go somewhere. So the necks get thicker and longer.

M1NM
09-28-2014, 6:24 PM
Always had good luck with RCBS dies and a Rockchucker.

BillnotBob
09-28-2014, 7:00 PM
Hello Hunt. I have done this with Redding dies. Make sure you lube the expander ball on both sides with a good lube, or dip the necks in powdered mica. The 7mm 08 has a longer neck than the 308, so check it after sizing. I never needed to trim after reforming. Do a chamber cast, a lot of factory chambers have a loose neck. Load a dummy round with a bullet and check the neck diameter against the chamber cast, Make sure you have at least 2 thousand clearance.

Sleighter
09-28-2014, 9:35 PM
tagged

emy
09-28-2014, 9:40 PM
The dillon works good just anneal befor resizing

Hunt
09-28-2014, 10:36 PM
if I go .260 to 7-08 will I need to turn the necks? That is something I would like to avoid.

fguffey
09-29-2014, 4:14 AM
The 7mm 08 has a longer neck than the 308, so check it after sizing.

The 308 neck is close to .305" long, the 7mm06 neck is shorter, it is about .281" long. TO determine the diameter of the neck in the 7mm08 measure the diameter of the neck on a fired case.

When necking up the neck gets shorter, when necking down the neck gets longer.

F. Guffey

BillnotBob
09-29-2014, 6:34 AM
Thank you fguffy for correcting me. The 7mm-08 neck is shorter. It is the case length that is longer, do to a longer shoulder. I blame my mistake on old man brain fart.

Hunt
09-29-2014, 1:06 PM
The 308 neck is close to .305" long, the 7mm06 neck is shorter, it is about .281" long. TO determine the diameter of the neck in the 7mm08 measure the diameter of the neck on a fired case.

When necking up the neck gets shorter, when necking down the neck gets longer.

F. Guffey

ah ha

Witch Hunter
09-29-2014, 6:00 PM
Guffy gets it.