What size Corn Cob do I need ??

[gray wolf]

I may have a few bucks to get some corn cob for my tumbler, my 45 ACP cases won't even look at me anymore. I like nice looking cases and I have had to settle for dirty and nasty.
I don't want to get the wrong size. I see at, I think, drill spot that I can get some for not to much money. They show a 20/40 size, is this the size you get when you by the more expensive stuff, like from Midway.
I tried the big stuff from a pet store one time and it was a pain in the ****
cakes up in the shells. The store ain't there anymore anyhow.

Sam

[oneokie]

I may have a few bucks to get some corn cob for my tumbler, my 45 ACP cases won't even look at me anymore. I like nice looking cases and I have had to settle for dirty and nasty.
I don't want to get the wrong size. I see at, I think, drill spot that I can get some for not to much money. They show a 20/40 size, is this the size you get when you by the more expensive stuff, like from Midway.
I tried the big stuff from a pet store one time and it was a pain in the ****
cakes up in the shells. The store ain't there anymore anyhow.

Sam

That is the size I use and have no complaints about plugged flash holes.

[ReloaderFred]

I use the 1/8" size that is advertised as small animal bedding. I buy it at the local lumber yard for $15.99 for a 40# bag. Don't get anything larger, or it will stick in bottleneck cases and you'll have to pick it out manually.

Hope this helps.

Fred

[oneokie]

Forgot to add this to my earlier post. The 20-40 size is smaller than the stuff sold by Midway.

[gray wolf]

What about this one ??


Product Information
Item Blast Media
Type 40 Lbs
Media Type Corn Cob
Grit 14 to 20
Nominal Dia. (In.) Max. 0.0551
Nominal Dia. (In.) Min. 0.0236
Nominal Dia. Microns Max. 1400
Nominal Dia. Microns Min. 600
US Sieve 18
For Use With Abrasive Blast Finishing Equipment
Application Used for Cleaning, Deburring, Finishing and Peening
Weight 42.97

[mike in co]

What about this one ??


Product Information
Item Blast Media
Type 40 Lbs
Media Type Corn Cob
Grit 14 to 20
Nominal Dia. (In.) Max. 0.0551
Nominal Dia. (In.) Min. 0.0236
Nominal Dia. Microns Max. 1400
Nominal Dia. Microns Min. 600
US Sieve 18
For Use With Abrasive Blast Finishing Equipment
Application Used for Cleaning, Deburring, Finishing and Peening
Weight 42.97

BINGO WE HAVE A WINNER!!!!!!

i think drillspot is the cheapest

mike in co

[Doby45]

Yheap that is the stuff. I use it thanks to Mike and my brass is stupid shiney in about an hour with a cap of NuFinish and a cheapo Lyman tumbler...

[AggieEE]

I've had good luck with the 40/60 ( I think) walnut blast media with a good shot of Turtle Wax buffing compound. The coumpound is white colored and water based carrier. You need to let it run for a while with the lid off so it will dry on the media. Nice shiny cases on a overnight run.
AggieEE

[BD]

I use 20/40 grit, and get only an occasional piece stuck in the flash hole. L.O. Beede is selling off their walnut shell stock if anyone near Lowell Mass wants a lot of it cheap. I bought graded sawdust from these guys for the tannery by the trailer load for years. Along the way I got enough corncob and walnut to hold me for a long time. The price is a typo, it's $19 for a 38 lb bag.


http://www.beedeandsons.com/industrialabrasives.html

BD

[jcwit]

Use either 14/20 or 20/40. Either one works fine, and does an excellant job. The 20/40 will NEVER glog a flash hole, not real sure about 14/20, Mike likes it tho and he sure should know with how much brass he polishes.

Use whatever.

[oneokie]

What about this one ??


Product Information
Item Blast Media
Type 40 Lbs
Media Type Corn Cob
Grit 14 to 20
Nominal Dia. (In.) Max. 0.0551
Nominal Dia. (In.) Min. 0.0236
Nominal Dia. Microns Max. 1400
Nominal Dia. Microns Min. 600
US Sieve 18
For Use With Abrasive Blast Finishing Equipment
Application Used for Cleaning, Deburring, Finishing and Peening
Weight 42.97

IMO, you will have to check each piece of brass for plugged flash holes if you deprime before tumbling, otherwise, you should be good to go.

[gray wolf]

OK, thanks men--
looks like I will go with Mikes choice,
but hey--you know I love you all-------------------------------like you all?

Sam

[cajun shooter]

If you buy ceramic one time that will be all that you will ever buy as it does not wear out.

[mike in co]

IMO, you will have to check each piece of brass for plugged flash holes if you deprime before tumbling, otherwise, you should be good to go.

just not so.............

one of these days i'm gonna chrono some ammo loaded from corn cobbed holes.......

mike in co

[oneokie]

just not so.............

one of these days i'm gonna chrono some ammo loaded from corn cobbed holes.......

mike in co

Please do. Should make for some interesting numbers.

[mike in co]

Please do. Should make for some interesting numbers.

the only time i see a corn cob in a flash hole being an issue is ,when and if, we look at full cases..as in 100% load density and the corn has no where to go. in all other cases the EXPLOSIVENESS of a primer will blow the little bit of corn cob right into the powder it ignites...with no notice by anyone.

mike in co

[Frozone]

.... a corn cob in a flash hole ......

And I'm having enough trouble behaving myself with the title of this thread as it is!!!! :twisted: :-P

[twotrees]

I was waiting for the discussion to turn to whether white or red cobs were softer.

:hijack::bigsmyl2:

[David2011]

The 14/20 from Drillspot is working well for me.

David

[JFrench]

Yep. I always heard size doesn't matter. Three red cobbs followed by a white cobb.
James

[waksupi]

I was waiting for the discussion to turn to whether white or red cobs were softer.

:hijack::bigsmyl2:

Grand dad always used red ones in the outhouse. Must have been softer. He kept using the outhouse long after they got inside plumbing. [smilie=s:

[9.3X62AL]

Before this thread degenerates any further (AHEM!) :) I've had great work from 14/20 corn cob grit from Kramer Industries in NJ. I tumble prior to sizing, so no grit-in-bad-places issues. I don't treat the grit, either--just plain. old grit cleans brass quite well.

[starreloader]

I use both 14/20 and 20/40.. after the citric acid bath the brass gets a general cleaning an light polishing in 14/20.. If I need to have brass polished bright then it goes into the 20/40..
Like Mike in Colo. I do volumes of brass, usually 50 lbs at a time...

[josper]

Most of the time I just use the lyman treated corn cob. This last time I tried the treated nut shells and they seem to work a little better.I know its more expensive but it last a long time for what I shoot.

[gray wolf]

I called powder valley--they had 40 pounds for $20 bucks,
get this the shipping was $30 bucks.
I didn't have to think to much on it. Ordered from drill spot $21=40 pounds to my door.
I got the 14/20 and I hope it works, I have a little of the Dillon rapid polish left in a bottle.

[alamogunr]

Sometime ago I got the 20/40 from Drillspot. It is really fine. My reloading and casting area is shared with my "woodworking" shop. My shop vacuum has a horizontal exhaust and since I don't always pay attention to which way the exhaust is pointed, I have at various times blown corn cob media everywhere. Once I let it blow over a box of foam peanuts that I had just unpacked. Those things will go in places you wouldn't believe.

I would prefer the 14/20 media, but I'm going to use up the fine stuff first. I probably won't stretch each batch like I might if I wasn't trying to use it up.

BTW, I'm looking for a plastic elbow to direct the exhaust up.

John
W.TN