Easy ES reduction & accuracy tip.

[huntnful]

I know some, maybe even most guys on here may do this. BUT I know some may not, and it helps a bunch. By simply taking a power drill and an oversized nylon bore brush (.30 cal brush for .28 cal case), brush out the necks of your cases. I did two small batches, side by side, one with brushing one without.

Without Brushing the neck:
Chattery/unsmooth bullet insertion
30fps ES
1/2 MOA groups

With Brushing the neck:
Noticeably smooth and consistent bullet insertion
10fps ES
3/8 MOA groups

The tighter groups could just be happen stance, however I think they come with the more consistent overall round. But the reduction in ES and smooth bullet seating are a very apparent benefit. This is by far the easiest and what seems to be a very beneficial step to reloading. You can grab 10 cases at a time and brush them out in 15 seconds. Hopefully this helps somebody tighten things up a bit!!

I'm sure some people will say they get great ES and accuracy without doing this. But for a few minutes of time, I think it's a very important and EASY step.

 

[Rob5589]

I always do this. I assumed it was a standard practice.

 

[Dmeis]

Interesting. I'll have to try it out.

 

[sneaky]

It's the same reason guys pay attention to neck tension and set everything up accordingly. Every little bit helps

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[N2TRKYS]

Meh. I’ve found that es has more to do with the speed node than anything.

 

[cutback]

I've always wrapped 0000 steel wool on a brush to do the same thing. I never thought of using a nylon brush...

 

[Sandstrom]

Thanks for the tip!

 

[MasterTimo]

Sounds absolutely interesting.

 

[wind gypsy]

Interesting. I’ve run them over a brush on the rcbs case prep station if worried about shavings from the giraud trimmer or leftover cleaning media residue but never taken it to this level.

 

[tdhanses]

Interesting idea, I’ve never tried this.

OP do you tumble your brass as well? Do you use a dry lube on your bullets or case neck as well?

 

[OutdoorAg]

Meh. I’ve found that es has more to do with the speed node than anything.

Need more info on this...

 

[huntnful]

Meh. I’ve found that es has more to do with the speed node than anything.

100% correct. It does have to do more with the node than anything. But this can easily lower the ES in a given scenario. Not saying you can have 100fps ES and brush the necks and drop it to 10 lol

Interesting idea, I’ve never tried this.

OP do you tumble your brass as well? Do you use a dry lube on your bullets or case neck as well?

Yeah I tumble and anneal also. No lubes though.

Need more info on this...

You find the .2 increment of grains that give you the least increase or decrease in velocity between the load. A lot to explain, but there’s some YouTube videos on it!!

 

[tdhanses]

100% correct. It does have to do more with the node than anything. But this can easily lower the ES in a given scenario. Not saying you can have 100fps ES and brush the necks and drop it to 10 lol

Yeah I tumble and anneal also. No lubes though.

You find the .2 increment of grains that give you the least increase or decrease in velocity between the load. A lot to explain, but there’s some YouTube videos on it!!

You should try the lube, makes a big difference in ES and only adds a second to loading.

 

[huntnful]

You should try the lube, makes a big difference in ES and only adds a second to loading.

Interesting! What do you use?

 

[tdhanses]

Interesting! What do you use?

Redding imperial dry neck lube. It’ll last you a very long time and isn’t expensive.

 

[hereinaz]

How clean do you make the necks? Are you just running it in and out? If it leaves a little carbon, it probably knocking it to a minimum that makes it work.

I haven't cleaned necks, I just leave the carbon so graphite sticks to it. After sizing with a bump, I run a graphite covered mop in the necks. Clean brass doesn't hold the graphite. Makes the steps of mandrel sizing and seating bullets simple. Makes consistent bullet releases too.

That's the trick at work here, getting a consistent release between bullet and case neck.

Some say clean brass necks and copper jackets will create a bond over time. The carbon/lube inhibits that bonding. Probably not an issue with fresh ammo. But, if it sits a long time it can be an issue apparently.

 

[huntnful]

How clean do you make the necks? Are you just running it in and out? If it leaves a little carbon, it probably knocking it to a minimum that makes it work.

I haven't cleaned necks, I just leave the carbon so graphite sticks to it. After sizing with a bump, I run a graphite covered mop in the necks. Clean brass doesn't hold the graphite. Makes the steps of mandrel sizing and seating bullets simple. Makes consistent bullet releases too.

That's the trick at work here, getting a consistent release between bullet and case neck.

Some say clean brass necks and copper jackets will create a bond over time. The carbon/lube inhibits that bonding. Probably not an issue with fresh ammo. But, if it sits a long time it can be an issue apparently.

I just run the brush in and out pretty quickly. Not polishing it by any means. But I totally understand what you're saying about the potential for super clean brass to bond to the copper bullet over time. I've heard of that also, but never experienced it.

 

[hereinaz]

I just run the brush in and out pretty quickly. Not polishing it by any means. But I totally understand what you're saying about the potential for super clean brass to bond to the copper bullet over time. I've heard of that also, but never experienced it.

Makes sense, you are probably knocking carbon to a minimum and consistent level. Loose carbon might even be a "lubricant".

If guys have left necks alone before, your suggestion seems worth the effort for sure.

 

[stevevan]

I just run the brush in and out pretty quickly. Not polishing it by any means. But I totally understand what you're saying about the potential for super clean brass to bond to the copper bullet over time. I've heard of that also, but never experienced it.

Excellent tip. I learned something new today.

 

[Shawn Hultquist]

When I shot competitive benchrest I obviously had to turn my necks down for a tight neck chamber .262 neck for a 6ppc. I cleaned the inside every time before reloading.

Brass prep is critical.


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