Author Topic: Some powder coated bullet findings  (Read 1115 times)

steveoh

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Some powder coated bullet findings
« on: January 03, 2020, 03:08:19 PM »
Some powder coated bullet findings...

Set up the Texan on the bench outside in the LeadSled, and gathered the chrony, a bunch of 257420 bullets that are lubed pure lead, and Powder Coated not lubed initially but later lubed with 10wt silicone oil.

200 bar fill.
Started with 5 bullet groups eliminating the very first shot.
Ended counting each of a 7 bullet group. Should have started with that.

After about 50 shots of both lead and Powder Coated I cleaned the barrel. Took 5 patches until I was happy. The patches were black/gray and showed a fleck or two of lead.

Cleaned barrel again after 30 shots or so of blue powder coated bullets. Took 7 patches to clean until I was happy. The patches were blue. I saw no lead residue or powder coat flakes. Only a subtle blue smear. I will test again when my new PC colors arrive. This guy from castboolits says to bake at 400 degrees for 15 minutes.

Powder coated bullets were baked at 400 degrees for 10 minutes. Makes me wonder if they would be harder at 20 minutes other companies recommend.

Velocity most definitely is lower for the dry powder coated bullets, as well as the lubed PC bullets.

At this point I’m still sitting in the fence. Here’s som chrony numbers:





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steveoh

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Re: Some powder coated bullet findings
« Reply #1 on: January 03, 2020, 03:15:02 PM »
Oh forgot to put the Clague moderator back on after first cleaning and when I shot the Texan I think I woke up a long dead and buried possum.  :o

Good grief that was loud.
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Alan

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Re: Some powder coated bullet findings
« Reply #2 on: January 03, 2020, 03:15:29 PM »
From what I can figure out, based on the data provided, not only are you happier, the slugs seemingly are better suited for you "alter-high-power-slug-guns! Capish?
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steveoh

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Re: Some powder coated bullet findings
« Reply #3 on: January 03, 2020, 03:20:37 PM »
I’m not sure. I think the regular lead bullets lubed are more efficient and faster at any given setting in the power wheel. Easy peasy barrel cleaning either way. The PC bullets do stay clean in my pocket, and my fingers don’t get leaded up.

But! I still don’t know about accuracy. That will require some place other than back yard.
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Loren

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Re: Some powder coated bullet findings
« Reply #4 on: January 05, 2020, 04:53:34 PM »
Steve, did you size after powder coating? 

I bake for 30 minutes at 400 deg.  I want the bullets at temp for at least 20 minutes, so I add 10 to get them up to temp.

I also size after powder coating.

I did see about 10fps slower with non lubed PC. 
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steveoh

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Re: Some powder coated bullet findings
« Reply #5 on: January 05, 2020, 05:56:50 PM »
Yessir. I sized to .257 after PC. I did however only bake for 10 minutes at 400 degrees. That is what the instructions said though.

Have you seen any PC residue when cleaning your barrels?





Steve, did you size after powder coating? 

I bake for 30 minutes at 400 deg.  I want the bullets at temp for at least 20 minutes, so I add 10 to get them up to temp.

I also size after powder coating.

I did see about 10fps slower with non lubed PC.
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Loren

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Re: Some powder coated bullet findings
« Reply #6 on: January 05, 2020, 06:04:17 PM »
I have not found any PC left in the barrels.
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steveoh

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Re: Some powder coated bullet findings
« Reply #7 on: January 05, 2020, 06:19:25 PM »
I have not found any PC left in the barrels.

Well, slap me on the fanny! I guess I need to do further work. My samples from that feller on cast boolits should hopefully send them out this week.
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steveoh

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Re: Some powder coated bullet findings
« Reply #8 on: January 18, 2020, 06:40:35 AM »
New sample colors.
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Loren

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Re: Some powder coated bullet findings
« Reply #9 on: January 19, 2020, 05:05:26 PM »
Steve you are going all Skettles!!

I picked up one of these today to see if power "shaking" would improve my result on a couple of tough powders I have not been able to get to "stick"

https://www.harborfreight.com/dual-drum-rotary-rock-tumbler-67632.html?_br_psugg_q=tubler

I have had this color for sometime and just could not get it to "stick" along with a couple of other colors that have just not been great at coating with the hand shake and bake method.

Tried it out and the powder was stuck to the bullets like white on rice. 

Before with hand shaking I could not get the powder to do anything more than a dusting.

These are after baking.

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steveoh

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Re: Some powder coated bullet findings
« Reply #10 on: January 19, 2020, 05:47:25 PM »
Cool!

I experimented by adding pieces of PVC fittings to my powder while shaking. Seemed to make the blue stick better but that orange was a big nope. Anyway with all the new colors I’m sure I’ll find I have better luck. Or I’ll end up with a tumbler also.

I did get some pvc soft air ammo I’ll thrown in while shaking and see if that doesn’t help.
  • Benicia, California
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sixshootertexan

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Re: Some powder coated bullet findings
« Reply #11 on: January 19, 2020, 05:59:56 PM »
Make sure both bullets and powder are warm. Mine didn't coat as good when the temperature dropped. Set your container with the powder in it on to of your oven for a few minutes.
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