I've been watching some of the Y-Tube videos about rail guns. Never heard of such before. Looks expensive.

At any rate one of the videos showed a person with what looked like a wire brush, brushing out the inside of the case neck. I've not done that in the past. Just cleaned the brass, swabbed out the inside with a Q-Tip to make sure there isn't any left over cleaning stuff in there, lubed and loaded.

Any reason to brush out the inside of the case neck for the average Joe? http://www.bing.com/videos/sea...70066AAB58E0FBDC99A5

Nope

quote:

p

It may change the neck holding force somewhat and affect to a small extent the powder burning rate but to only a small amount. Not to fear. roger

I only brush out the neck when I have to trim cases. I don't know that it accomplishes anything but it makes me feel better.

I brush out cases only on black powder cases after washing them in vinegar.

Quite a timely post as I was only just recently reloading a batch of 7mm-08 cartridges for my two sons to use and noticed after sizing, cleaning and priming the cases that some of the once fired Federals had the odd spot or smear of verdigris inside the neck.
I use graphite for inside neck lube and don't usually swab out this area when reloading but on seeing the verdigris I chucked a soft bronze bore brush in the battery drill and ran each case onto it as it spun, not too fast.

The inside case necks looked real good after that with no staining and a slight polish and bullets seated nicely with good neck tension.

I often do not tumble or otherwise clean my brass. I also do not lube the inside of my case necks. When not cleaned or lubed, the brass will greatly benefit by brushing out the case neck to remove whatever is in there. This allows the neck expander to move more freely and saves effort on the press downstroke.

I have read that it saves wear and tear on dies, or at least on buttons. I do it because I think it may result in more consistent bullet pull.

Im lazy.....so I won't do it

I brush out the case necks because its twice as hard to size them if I don't. The expander ball seems to have way more friction in unbrushed cases.

quote:

Originally posted by RMiller:
I brush out the case necks because its twice as hard to size them if I don't. The expander ball seems to have way more friction in unbrushed cases.

+2

A bore brush in a drill motor makes short work of it.

quote:

Originally posted by bartsche:

quote:

p

It may change the neck holding force somewhat and affect to a small extent the powder burning rate but to only a small amount. Not to fear. roger

This.


.

Part of my routine is to use the right size plastic brush from (former) mica dry lube station/set-up from Midway prior to lubing .

After trimming or chamfering, I do it again as I clean last vestiges of lube with cleaning cloth. Over time I have noticed black flakes accumulating around the base of brush station.

I also use Imperial dry lube (graphite) instead of mica or "goop" inside and outside necks before sizing, FWIW, but think the black stuff is burnt powder. This would have some minor effect, over time, if never cleaned.

If you're referring to inside case neck lubing, yes, do it on all bottle neck cases. Simply makes sizing easier.

I have tried brushing/scrubbing/polishing of case neck interiors, no noticeable difference to accuracy has been noted.
One thing I do that HAS yielded tighter groups, when using an expander button type die, use a VERY SMALL amount of powdered graphite on a calibre specific nylon brush BEFORE SIZING IT. A few strokes with a tiny amount of graphite seems to stop nearly all runout on necks. It also reduces 'pull' on the neck, minimising case growth in the neck.
I do not remove the graphite, however, it is my experience it helps negate any 'cold welding' of the bullet to the case neck and my neck tension stays pretty consistent.

Cheers.