Who makes it/whats is called?

[Nvreloader]

Guys

I have a OEM Ruger 77, 7mm Rem Mag, (wifes favorite hunting rifle)
because of resizing the case body to fit the chamber, with med to light resistance,
I am starting to get case body separations cracks, just above the belt, after 4-5 reloads,
because the OEM RCBS dies.

I have seen a sizing die (on this site, IIRR), that uses a split collet type sizing die,
that will resize the case body to the dimensions needed, while not touching the shoulder/neck area.

I cannot remember the brand name or where to find it etc, for this sizing die,
can someone help me out?
As I need to get one.

Tia,
Don

 

[LRPV]

http://www.larrywillis.com/

I think this is what you're talking about but I'm not sure it will fix your problem.

 

[jlow]

You are more likely getting your “case body separation cracks, just about the belt” because you over sized your case bumping shoulders down too much. When it stretch out during firing, it will stretch out where that crack is, multiple over sizing, multiple stretching will cause what you see.

 

[Dusty Stevens]

Check and see if a body die is what youre looking for

 

[Nvreloader]

Thanks guys for the info,

The Larry Willis die is just what I was looking for, TKS, LRPV.

DS, I am NOT sure what you mean by a die body?

Jlow
You are correct,
this what is happening,
I have to set the shoulders back about .012-.015",
just to get the case body diameter right above the belt,
sized to fit this chamber, for a med feel in chambering, other wise, the case chambers too hard.
This brass is only shot in this rifle, and the sons Ruger 77 Mag is at the other end of the scale.

This rifle is a couple of OEM rifles that do NOT have a custom chambers,
as I normally rechamber to certain spec's on my reamers for the brass used etc.

I will get a custom reamer ground and rechamber both rifles, after hunting season.

As I don't see any other way to size the case diameter above the belt,
for positive function/feeding etc, without touching the shoulder etc.

I am open to any thoughts/suggestions/Ideas to correct this problem,
as we have 2 pending Bull Elk hunts is less than 30 days.

Tia,
Don

You are more likely getting your “case body separation cracks, just about the belt” because you over sized your case bumping shoulders down too much. When it stretch out during firing, it will stretch out where that crack is, multiple over sizing, multiple stretching will cause what you see.

 

[dkhunt14]

If I was spending the money on a hunt I would use new brass to ensure you don't have problems. A case left in a chamber a long ways from something to get it out would not be good. Matt

 

[ericbc7]

I haven't loaded belted magnums personally, but from what I've read, the procedure for resizing cases should be;
1 - size the body using Larry Willis' collet die
2 - bump the shoulder back .002 or .003 with your standard full length die.

This should make the case headspace on the shoulder instead of the belt and will extend brass life. This adds a step in the case prep but is much cheaper than re-chambering your rifles.

I'm not sure if it makes a difference which operation you perform first, but you might check your runnout both ways and decide based on the numbers.

Good luck with the hunt!

 

[Concha]

Neck size after fire forming and be done with it. Bump the shoulder .001 when it no longer chambers

 

[jlow]

If I was spending the money on a hunt I would use new brass to ensure you don't have problems. A case left in a chamber a long ways from something to get it out would not be good. Matt

Agree with Matt. With the relatively small number of rounds fired from a hunting rifle, and as in this case the extra hassle dealing with a belted magnum, I would say skip reloading and just shoot factory ammo. Can't be much savings after paying for all the specialty reloading equipment and hassle.

 

[Dusty Stevens]

Its a body die. Available from redding in stock at midway. Its usually for the neck sizer crowd to fix their brass when they are against FL sizing. In your case it should be exactly what the dr ordered. I use them on anything headed for a grizzly, moose or any other animal thatll kill you.

http://www.midwayusa.com/product/411666/redding-body-die-7mm-remington-magnum?cm_vc=ProductFinding

 

[Concha]

Im not really a neck sizing guy but for belted magnums experiencing seperation it is a good call. That or have a custom die made from fired brass. I might be wrong but I have fired some of My 7RM brass 15 + times using the neck sizer until I need to bump. I anneal also.