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  #1  
Old 09-22-2012, 01:25 PM
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Copper-eating test: Boretech vs. KG-12


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Here's an informal 'test' I did to see how a bullet would react to being submerged in bore cleaner; specifically, copper cleaner. This is only a comparison of Boretech and KG products, because I've already satisfied myself that these are dramatically better than pretty well everything else on the market. I've seen this kind of thing done by others online, so at least this comparison will be similar to those efforts, even if they're not a controlled evaluation of gilding metal removal from the inside of a barrel.

So, I started with this:


Boretech's Cu+2 on the left, Eliminator in the middle, and KG-12 on the right. All I did was put these 26-cal bullets in the plastic cups, fill the cups with enough of the cleaners to just submerge them, and let them sit. I did NOT swirl, roll, rub, nor otherwise mess with the cups & bullets during the test. At the end, I DID wipe them with a paper towel as hard as I could without breaking through the fiber of the towel.

The Boretech products seemed to 'disappear' at a very slow rate during the initial hour or two of the test, so a couple times I had to add some more solution to those cups. The KG-12 did not disappear until I left the bullets overnight. When I got to them this morning, the KG bullet was no longer submerged, but it was mostly still covered by the cleaner. Close enough, I guess!

I weighed each bullet on my cheapie electronic scale before pouring the solution over them. No fans nor the HVAC system were running for any of the weights, and I made sure the scale was zero'd before each weight was taken. The Cu+2 bullet weighed 140.4 grains, the Eliminator bullet weighed 139.8, and the KG-12 bullet weighed 140.3.

For those not familiar, the Boretech products are clear and thin, very much like water. The KG-12 is an orangey-yellow solution that is somewhat more viscous than the other products. The Boretech products instantly started to turn blue or blue-green when I poured them over the bullets. The KG didn't change color.

After 25 minutes, the 2 bullets in the Boretech products looked nice and shiny under the liquids, just like when they came out of the box. The bullet in the KG solution was significantly 'frosted' and dull. The Boretech liquids had increased in 'blue-ness,' and the KG solution still looked the same.

Here's what they looked like after sitting for about an hour:


You can see that the Cu+2 is more blue than the Eliminator; which difference held throughout the test. The KG still looks like it did when it came out of the bottle. By now, the Cu+2 bullet looks moderately frosted, the Eliminator bullet is still quite shiny, and the KG bullet looks terrible! After this, I put a piece of plastic wrap loosely over the top of the three cups and let them sit until morning.
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Last edited by MZ5; 09-22-2012 at 05:59 PM.
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Old 09-22-2012, 05:21 PM
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I weighed the bullets last evening about the time I took that last photo, but unfortunately that information was lost. I'd claim our puppy ate it, but he didn't; it's just gone. Anyway, below are some closer photos of the individual bullets.

Cu+2:



Eliminator:



KG-12:
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Old 09-22-2012, 05:26 PM
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This morning, I pulled the plastic cover off after a total of 14 hours soaking in the solutions. Here's an overview picture:



You may be able to tell that the KG-12 solution level went down a bit overnight, so the very 'top' side of the bullet is exposed to the air.

Here are close-ups of the bullets. I did not dry or wipe them for these 3 photos, I just laid them on the paper towel. So, these are 'wet' or rather semi-air-dry photos.

Cu+2:




Eliminator:



KG-12:

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Last edited by MZ5; 09-22-2012 at 05:29 PM.
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Old 09-22-2012, 05:46 PM
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Finally, here are photos of the bullets wiped dry with a paper towel. I rubbed them all as hard as I could without ripping the paper towel, which isn't all that terribly hard, especially with the KG-12-soaked bullet. It had a distinctly more 'rough' texture/feel to it. The bullets are, left to right, Cu+2, Eliminator, and KG-12:






I rolled them to their 'best' and 'worst' looking sides for those two photos.

Final weights:
Cu+2 = 140.4 gr. (start weight = 140.4; 0.0 grains weight lost)
Eliminator = 139.8 gr. (start weight = 139.8; 0.0 grains weight lost)
KG-12 = 138.5 gr. (start weight = 140.3; 1.8 grains weight lost)

The weight loss figures may be skewed if there was still liquid in the hollow points. As anyone who has worked with Hornady's 26-cal HPBT Match bullets knows, the openings are TINY. I tried to shake them out and blot them with the towel, but I can't tell whether there was any liquid in there or not.

You may note that the weight loss figures I obtained are dramatically lower than some of the other comparisons of this sort that one sees on the internet. I do not know what caused the difference, but I know that I used different bullets than some other testers out there (these are Hornady's AMP-jacketed match bullets), and that I may have used different procedures or handling. I didn't go look up and re-read the other comparos before deciding last night to do this 'test.'

It is clear that the Boretech products are working, so they 'should' have lost weight. I have also found them to be excellent cleaning products, so my experience with them also demonstrates that they clean copper (okay, gilding metal) out of rifle barrels. I speculate that there may be a difference in weight loss if I were to re-run the experiment and brush the bullets with a bore brush periodically during the test. These were the last 3 bullets in that box, so I won't be re-doing the test with these particular Hornadys.

Anyway, I thought some might be interested in this. The Boretech and KG cleaning products are the absolute best chemical cleaners I've found thus far. I believed I had perceived a difference in efficacy between these products lately in dealing with a SEVERE-barrel-fouling rifle. The outcome of this informal 'test' aligns well with that perception.

Hope someone finds this entertaining, or amusing, or likes the color of the wife's countertops or something.
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Last edited by MZ5; 09-22-2012 at 05:49 PM.
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  #5  
Old 10-17-2012, 04:21 PM
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Excellent report and good photos! Thanks for sharing. I've never tried the KG, looks like I might need to get a bottle.
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Old 10-17-2012, 04:43 PM
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Shoot, I could have told you that before you wasted three bullets. KG1 and KG12 is mainly all I've used for almost two years. I do keep a can of Xtreme Clean foam cleaner in my bag and spray it in the warm barrels when I get through shooting and let it soak for the drive home. I then clean them with the KG products when I get home. This works the best of any method I've used. It takes very little effort to get them clean and the carbon buildup in the throat comes out a lot easier. Not easy, just easier.
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Old 10-25-2012, 08:26 AM
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That aligns with my experience, too. I squirt Eliminator down barrels at the range and usually find the guns come clean very easily at home. I like being able to use just one product where possible and Eliminator seems to be a good jack of all trades. Most copper in barrels is actually very thin, which you find pushing a slug through, so it's not surprising you get it out more readily than the bullet test reveals.

I would have degreased the bullets first. Don't know if you did?

I once left a cast bullet sitting in some Eliminator and found it etched the surface lightly. I also completely took the 0.002" thick copper wash layer off a steel bullet (surplus military) with KG-12. Its capacity is huge. It's only drawback is you can't tell when it's done by looking at the color, so a third product may need to be applied.
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