Anyone resize .308 to a 7mm-08? Any extra steps or simply run a .308 through a 7mm-08 die and maybe trim?

Thank you.

Both of my 7-08s think they are 308s because of the head stamps. Simple one pass operation to resize 308 into 7-08.

It works, but with quality brass available, why do it unless you have a bunch of undedicated brass.
Sometimes the necks on the re-calibrated cases require a lot of attention to make them concentric, or even thin enough to seat the bullets without a bulge or wobble.
If you do it, Mark those cases plainly. (please)

7mm-08 is difficult to find and .308 is less expensive also. I have over a thousand rounds of .308 brass and the only 7mm-08 I have found are $51 a hundred. I am just getting started with my 7mm-08, I really like the round.

I have done this a lot you may find some brass needs neck turned after sizeing. I found some range pickups that did.

I just re-size and trim. Works fine!

If you've a factory rifle, I think neck turning would be of little concern. The only time I've had to neck turn .308/7-08 brass was with a rifle with a custom barrel.
'Course it wouldn't hurt to measure the reformed brass with a bullet in it and then mesure the neck after you've fired it to see if you've got room for the neck to expand and release the bullet.

I've reformed 308 brass down to 243 in one pass for a factory gun that had a really sloppy chamber.

quote:

7mm-08 is difficult to find and .308 is less expensive also.

there is nothing wrong with resizing brass. but if it is available, i buy new brass.
Cabela's has plenty of 7MM-08 brass, it is not hard to find.. i buy it alot.

quote:

Originally posted by Fjold:
I've reformed 308 brass down to 243 in one pass for a factory gun that had a really sloppy chamber.

I've done the same for a gun with a relatively tight chamber. The chambers of most guns rarely require neck thinning when doing this, and even less so with the 7-08.

It is best to work with brass that has been fired no more than once since brass fired several times will have necks that are somewhat work hardened and may split unless annealed (and annealing is a delicate art best avoided unless absolutely necessary.)

I have a 270-08 which is the cousin of the 7mm-08.
I run 308 Win Lapua brass in one pass through a RCBS FLS die. I have also used RP, FC and WIN brass as well that was 7mm-08 and 308 Win.