Seating die issues

[wildfowler.250]

I thought I’d make this a slightly separate post to my last thread as it’s a more specific issue. So far I’ve done all the case prep and I’m trialing seating bullets in resized cases,(no powder) to get the correct length.

Im using new brass and full length resized them. Made sure they’re all similar length ect.

Im using accubonds in the .270 and nosler textbook says tested length 3.320”. Saami max overall cartridge length 3.340”.

Now my friend has previously given me nosler ballistic tips and they measure 3.250”,(textbook also tested these at 3.320”).

I sat the accubond a little ‘shallower’/less deep than 3.250 and worked back. When I got past 3.270” the bullet started getting stuck in the die,(now removed) twice.


I’d have thought this was less likely to happen when making the overall cartridge length longer? And can I set it to the shorter 3.250” and just monitor for signs of pressure?


The case neck subsequently also looks deformed and I’ve scrapped it. Anyone have any pointers as to why this is happening?


Stopped for the evening so I can look into this a bit further.


cheers!

 

[DazT]

What dies are you using?

 

[JTO]

It looks like you have created a do'nut at the body:shoulder junction. Did you try that round in the chamber?

 

[wildfowler.250]

It’s an rcbs die.

No I haven’t yet but I’ve still got it. Thought I’d basically written it off? Worth trying for fit?

 

[DazT]

Looks like the case has grabbed the bullet during seating and trying to seat the bullet has deformed the case...
Did you de burr and chamfer the case neck??

 

[Whitebeard]

For some reason you have way to much neck tension, you can see that from the way the bullet is bulging the neck just before the neck/shoulder junction, the pressure of forcing the bullet in is causing the shoulder to collapse.

Ian.

 

[wildfowler.250]

Looks like the case has grabbed the bullet during seating and trying to seat the bullet has deformed the case...
Did you de burr and chamfer the case neck??

Yes, thank you for the suggestion.

 

[Whitebeard]

Although its highly unlikely, measure the bullet diametre and make sure its not a 7mm.

Ian

 

[wildfowler.250]

For some reason you have way to much neck tension, you can see that from the way the bullet is bulging the neck just before the neck/shoulder junction, the pressure of forcing the bullet in is causing the shoulder to collapse.

Ian.

Thanks Ian. It was reasonably tight fitting one or two of the cases onto the ezee trim pilot as well. Is this a problem because they’re brand new? Can they be fired? They don’t look great..

 

[paul o']

IMO the seating die set up wrong best way is to go to you tube and watch how to set it up ,looks like you have it hitting the shell plate and crushing it pos on the up stroke as it cams to the very top of crank . it only needs to touch the brass shoulder do this by feel then back it off 1/4 turn lock it then with the top part of the die a just the seat as needed .

 

[Yorric]

It sounds like you maybe didn't size & chamfer/deburr the new brass before loading it. That could be the reason for the problems.
Paul's suggestion in post 10 could also be the reason.

Ian

 

[paul o']

Just cant see it as the bullet has not deformed the neck and it seems to be correctly located as to seating ,could be wrong life's full of mysteries

 

[wildfowler.250]

Thanks guys. I’ll admit it was just touching as Paul suggested but I didn’t back t off a 1/4 so that’s something to try.

Is it reasonable to seat them at 3.250” even though the textbook says 3.330? The bullet was jamming in the die for some reason when I was trying to lengthen it.

Cheers!

 

[DazT]

I would stick to the oal in the load data for that bullet make and type
You can fine tune it to the throat once you have an accurate load

 

[JTO]

Backing it off 1/4 turn makes more sense that the Lee die instructions, which tell you to turn it 'in' 1/4 turn.

 

[deeangeo]

It seems if you’ve read the manuals and online data/info/youtube instruction, it’s clear you haven’t yet understood the detail properly.
You need to clearly understand what to do, how to do it and why.

You really need to find some one to one help on reloading before you either damage your rifle or injure yourself.

Take care and go through the whole process again thoroughly and most importantly, find someone who knows how to reload safely and get them to show you.

 

[reloader54]

It seems if you’ve read the manuals and online data/info/youtube instruction, it’s clear you haven’t yet understood the detail properly.
You need to clearly understand what to do, how to do it and why.

You really need to find some one to one help on reloading before you either damage your rifle or injure yourself.

Take care and go through the whole process again thoroughly and most importantly, find someone who knows how to reload safely and get them to show you.

^This^ seriously.

never squeeze a trigger on this much uncertainty.

 

[Whitebeard]

Wildfowler, there is no need to resize new brass, it is already the correct size, do you have any left that you have not FL resized? if so load them and i bet you they will be good, the ones with collapsed shoulders cannot be used they will have scrapped, the cartridge headspaces in the chamber on a datum point which is on the case shoulder.

Ian

 

[wildfowler.250]

Backing it off 1/4 turn makes more sense that the Lee die instructions, which tell you to turn it 'in' 1/4 turn.

Two opposites just to keep things simple. I’ll try backing off

 

[paul o']

That the best advice a new reloader can take on board , the stuck bullet in the die was more than likely the brass being forced up the tube as it were grabbing it not the bullet as it holds on the ogive thus a constant pressure all around the bullet jacket and prevents it going in ****ed . Well done for asking its how you become safe we all have made cock ups and why we understand how and why your picture made it easy to understand how it got malformed