Resizing with primer in Place

[deeangeo]

The case headspaces on the shoulder, seems to me the shoulder isn't bumped back quite enough.
The best way to check is with a headspace guage... Hornady make on & it's important to size to the 'Fired case headspace'.
Do that rather than set your sizing die per manufacturers instructions.
On firing the case length including the case shoulder gets longer & can/does prevent correct chambering of the round.
As previously said, retract the expander rod into the die & resize

 

[kenbro]

The weird thing is I did 100 cases in one batch, so the bit I dont understand is why some are OK and others not!

A Tikka .243 i had couldn’t be relied on to chamber every single round of factory PPU ammo.
Apparently SAMMI and CIP use different data for manufacturers to work to.
This allows a difference in tolerances to finished rounds.
There has been a thread on this.
Kb.

 

[finnbear270]

Many years ago, I had similar with .223 reloads .................... I had omitted to case mouth de burr outer on some, these were the ones refusing to chamber.

 

[Sako6.5x55]

Does the brass chamber with the bullet removed?
If it does it’s not the brass it could be bullet creep because of case pressure when seating, bump your seating die twice.
If it doesn’t fit, resize and try the brass again.
If it doesn’t fit after resizing, the die is set wrong.
If it fits after resizing seat your bullet and check chamber fit again.
If it doesn’t chamber after seating the bullet the issue is with your seating, which could be bullet creep, it could also be case neck burring which happens with poor quality or a hard brass. If it’s neck burring put a bigger chamfer on it, inside and out.

 

[finnbear270]

Does the brass chamber with the bullet removed?
If it does it’s not the brass it could be bullet creep because of case pressure when seating, bump your seating die twice.
If it doesn’t fit, resize and try the brass again.
If it doesn’t fit after resizing, the die is set wrong.
If it fits after resizing seat your bullet and check chamber fit again.
If it doesn’t chamber after seating the bullet the issue is with your seating, which could be bullet creep, it could also be case neck burring which happens with poor quality or a hard brass. If it’s neck burring put a bigger chamfer on it, inside and out.

^ I would check this out first.

 

[malmick]

If it doesn’t chamber after seating the bullet the issue is with your seating, which could be bullet creep, it could also be case neck burring which happens with poor quality or a hard brass. If it’s neck burring put a bigger chamfer on it, inside and out.

Can't ID the source of this right now but I remember reading of an issue somewhere on the net about 6.5 CM and seating bullets that were tight in the case mouth and causing the case shoulders to creep or deform enough to prevent the cartridge seating in the chamber of the rifle concerned. Presumably due to the shoulder angle?

 

[Diggerdez]

Can't ID the source of this right now but I remember reading of an issue somewhere on the net about 6.5 CM and seating bullets that were tight in the case mouth and causing the case shoulders to creep or deform enough to prevent the cartridge seating in the chamber of the rifle concerned. Presumably due to the shoulder angle?

I had this exact problem when Bumping 308 brass down to 260 rem, ended up binning them and bying new brass

 

[hendrix's rifle]

Easy solution - you're loading heads. You need to load bullets

 

[finnbear270]

Easy solution - you're loading heads. You need to load bullets

 

[jthyttin]

Back the decap stem off and resize primed case

Better would be to take off decapping pin, and keep the stem in correct position. If it's not possible (due to stem design), you need to carefully check that moving the stem up doesn't end in situation where the fat part of stem is too close to neck part of die. Otherwise you might get the mother of all f*ckups, trapping the case neck between the stem and die body.

You can do the comparison by marking the position of stem, taking stem out and placing stem, die body and a case in shellholder next to each other (top of shell holder positioned to bottom of die body).

 

[jthyttin]

Hefty load,what's your h2o capacity and coal

The load is below VV maximum (45.5gr), but IMHO N550 is too slow for 95gr. But it's not bad choice, since there is published data. Personally I would have started experimenting nearer the minimum (42.6gr).

 

[jthyttin]

Apparently SAMMI and CIP use different data for manufacturers to work to. This allows a difference in tolerances to finished rounds.

Rifle and ammunition in UK would be both CIP compliant. But 243 is one of the cartridges in CIP, where maximum size cartridge won't fit minimum size chamber. IME at least some PPU ammo is sized closish to CIP max, e.g. my 308 T3 doesn't chamber their 145/147gr FMJ freely (as in needs a bit force on bolt handle) but PPU SP rounds do chamber freely (I use also them for offhand practice not hunting, since got a good deal on them).

CIP - Homologation

bobp.cip-bobp.org

 

[Neddle]

The load is below VV maximum (45.5gr), but IMHO N550 is too slow for 95gr. But it's not bad choice, since there is published data. Personally I would have started experimenting nearer the minimum

 

[Envillegc1]

Hefty load,what's your h2o capacity and coal, I'll look at grt tomorrow

COAL 2.6000,

 

[Envillegc1]

that’s a lot of powder… assuming this is what’s in your newly reloaded ammunition? Were the cases you’ve resized from once fired factory ammunition?

Yes
Once fired Seller and Bellets

 

[Envillegc1]

Does the brass chamber with the bullet removed?
If it does it’s not the brass it could be bullet creep because of case pressure when seating, bump your seating die twice.
If it doesn’t fit, resize and try the brass again.
If it doesn’t fit after resizing, the die is set wrong.
If it fits after resizing seat your bullet and check chamber fit again.
If it doesn’t chamber after seating the bullet the issue is with your seating, which could be bullet creep, it could also be case neck burring which happens with poor quality or a hard brass. If it’s neck burring put a bigger chamfer on it, inside and out.

No, essentially. I have 15 out of 100 that do however, which is the bit I am confused about.
Thanks will try the other idea.

 

[kenbro]

Can't ID the source of this right now but I remember reading of an issue somewhere on the net about 6.5 CM and seating bullets that were tight in the case mouth and causing the case shoulders to creep or deform enough to prevent the cartridge seating in the chamber of the rifle concerned. Presumably due to the shoulder angle?

Pretty sure, if the seating die is not correctly set, it can push down on the case mouth and slightly spread the case were the neck meets the shoulder and so prevent the case from chambering.
Ken.

 

[Envillegc1]

The load is below VV maximum (45.5gr), but IMHO N550 is too slow for 95gr. But it's not bad choice, since there is published data. Personally I would have started experimenting nearer the minimum (42.6gr).

95gr was just an experiment to see it I could get them to work as I prefer Vmax for Charlie.

 

[Neddle]

I've reused s&b brass 5 firings with no issues but that is neck sized.

Gary

I find S&B brass very good,annealing and moderate loads have me well over 10 loadings

 

[Donkey Basher]

Pretty sure, if the seating die is not correctly set, it can push down on the case mouth and slightly spread the case were the neck meets the shoulder and so prevent the case from chambering.
Ken.

This is a not uncommon issue when using a FL due to just ‘bump’ the shoulder - it is usually visible to the eye if you look down the side of the case from the head towards the neck.