.308 Over FL resized? are cases unuseable?

[wayno1]

.308 Rem 700PSS standard bbl & twist

OVER FL resized some brass for .308. May have pushed shoulder back too far.

Using a Midway comparator gauge the base to shoulder point (mid point? - the Sinclair and Midway gauges seem to hit shoulder at different points)

Pulled the bullet on an unfired .308 186gr SMK Federal GMM I read : 1.6115 taking several readings.

On about 20 cases I over-resized I show a shoulder set back to 1.604

Are these cases still useable? Refireform them for use or toss?
They are a tad shorter at the base than a standard Dillon Case gauge. OAL is within specs.

Thanks!

 

[varmint slayer]

You should be fine. After you fire them measure from the the shoulder again and see what it reads. Then just bump the shoulders back .002 or so. If they still chamber ok then I would just neck size them until you need to bump the shoulders back again. As you keep reloading the cases, keep an eye on the case head. If it starts to show a shiny ring about 1/8 above the case head then toss them as a case head separation failure is on the way.

 

[wayno1]

Thanks! I have tried chambering them ion the rifle. The ones that won't engage the bolt so they eject properly I have tossed.

 

[FLIGHT762]

You had a thread a month ago regarding this. ** http://www.snipershide.com/shooting...d-case-resizing-neck-setback.html#post2402309 **


This issue was beaten pretty hard and many of us tried to help you with your delimma. You're asking the same question again?

If you use two different manufacturers of bump gauges (NOT comparators, comparators are used to measure bullet ogive) you are going to get TWO DIFFERENT READINGS. You will also get two different readings from your fired brass in your rifle. Take the fired brass from your rifle, measure the shoulder bump from one of the bump gauges and bump (Full length resize) your case shoulders back .001"-.002". It is that simple. Don't try to use a reading from one bump gauge to another because the readings will read differently. I use a Hornady bump gauge and a Sinclair bump gauge. They both accurately measure the shoulder bump, but the caliper readings are different numbers from one another.

If you think you resized /bumped the shoulders back way too far and you're afraid, then toss the brass.

If you lived close to me, I'd help you with this, but you don't. There's a few Illinois members on this site. You can always save the brass, put it aside until you can get some help from someone that knows what their doing and have them help you do some measuring and see if the brass is useable or unusable.

 

[RTK]

I've use pistol brass and a micrometer to measure how much I need to bump back. Doesn't really matter what you use as long as you are using the same reference point.

 

[Greg Langelius *]

I have never measured a shoulder in my life. My chamber is my headspace gage. If there's a small bolt drag on bolt closure, my headspace is perfect. Don't overthink reloading; it's not a hobby, it's a necessary evil.

 

[218bee]

+1 on what VarmintSlayer said...