Neck Turning - Donut Removal

[223AI]

I don't think a COAL of 2.290" with my 223 using 53gr V-Max is too deep in the neck. I'm pretty sure its a symptom of "brass flow" rather than seating depth.

How many firings? If you've got that much brass building up in the neck it's come from the web

[loiner1965]

could it be that you been neck sizing and the die been set too much and squeezed the neck too much.
hence seating bullet as created a do nut.....only speculating as i remember picking up the rcbs neck die rather than the full length one.....it squeezed the neck too much and the bullet struggled to seat

[Elliott]

could it be that you been neck sizing and the die been set too much and squeezed the neck too much.
hence seating bullet as created a do nut.....only speculating as i remember picking up the rcbs neck die rather than the full length one.....it squeezed the neck too much and the bullet struggled to seat

I don't think so. Never really had a problem seating bullets and I've been using the Hornady die for a few years now - thanks anyway. Might go down the neck turning route to see if it improves my groups. Watched one of Si-snipe's videos and it seemed to work for him.

[loiner1965]

I don't think so. Never really had a problem seating bullets and I've been using the Hornady die for a few years now - thanks anyway. Might go down the neck turning route to see if it improves my groups. Watched one of Si-snipe's videos and it seemed to work for him.

reload for 6 calibres and never come across this issue.
i googled it and most say its a loose chamber so when sizing it pushes the brass down then the shoulder pushes it back up.....not technical am i lol

[Elliott]

reload for 6 calibres and never come across this issue.
i googled it and most say its a loose chamber so when sizing it pushes the brass down then the shoulder pushes it back up.....not technical am i lol

It's not as pronounced as I'm probably making out. I genuinely think it's down to the bass flow. You have to look inside the neck of the case, in good light, to see what I'm referring to.

It'd probably go unnoticed for most, but I'm a bit anal and want to keep shrinking my groups

[Elliott]

How many firings? If you've got that much brass building up in the neck it's come from the web

About 8-10 firings I guess

[223AI]

About 8-10 firings I guess

I'd be getting some new brass, how many times trimmed?

[Elliott]

I'd be getting some new brass, how many times trimmed?

Mmm.. Maybe eh. Probably half a dozen maybe.

[223AI]

Mmm.. Maybe eh. Probably half a dozen maybe.

Yeah, time for new brass

[pothunter]

Yeah, time for new brass

Derided as the may be by some people, Lee Collet Neck dies may be one option.

[Parabuteo]

You need a neck reamer then and not a neck turner. Why take brass off the outside of the neck when it is forming at the shoulder/neck junction? The doughnut will still be there.

Usually you only need to neck turn for a tight neck in the chamber or possibly to lightly true up the necks on some cases, but if it is all down to flow, it will just re-occur anyway as the brass flows forward into the neck. The errors in concentricity start back in the case body where one side might be thicker than the other and this simply extrudes forwards, so it will re-occur evetually if you just neck turn.

If you are worried about incipient head seperation use a piece of wire with a bend and run it over the inside of the case, you will feel it before you see it by which time its replacement time.

I have had 2 cases of head sep.

In .303 where I FL re-sized. Neck only prevented it and I assume the chamber dims were a bit generous as the head spacing was ok

In 5.56x45 where I swapped FL dies and did not set the new one up properly and over bumped the shoulders back. A Dillon gaugue soon showed the error and it was sorted.

[stillair1]

Mmm.. Maybe eh. Probably half a dozen maybe.

That's quite a bit of trimming, any signs of bright rings up near the case head. Id be looking at new brass myself as a simple fix.