I'm running Missouri Bullet Company 155gr coated lswc through my M&P40 2.0 Compact - 4" barrel. I ran them up to 1250fps and started getting leading in the last inch of barrel - completely clean before that. It looks like a classic lube failure. Anyone else have experience with hitek (hytek, hi tek, etc.) Coating?
Leading at muzzle with hitek coating?
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Yes, I've run into it before. Actually with MBC's bullets, 44s.
When I had issues with them they attributed it to a couple things.
To me the spray on coating process is no better than the person doing it & can lead to inconsistencies.
You might just try lowering the powder charge a bit to see if that helps.
.
When I had issues with them they attributed it to a couple things.
To me the spray on coating process is no better than the person doing it & can lead to inconsistencies.
You might just try lowering the powder charge a bit to see if that helps.
.
muddocktor
Member
I ran into leading problems with Hi Tek coated bullets from SNS in the past, mainly with 44 caliber bullets. When I backed them down to 1000 ft/sec or less the leading went away.
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I've had good luck with Missouri Bullet HiTek coated .38's and 9mm's. Had the 9mm's up to around 1150 fps with no hint of coating transfer.
Check your powder choice. Some burn hotter than others. You want the cooler ones. TiteGroup is notorious for being hot. It's a good, cost effective powder but it does burn hot.
Check your powder choice. Some burn hotter than others. You want the cooler ones. TiteGroup is notorious for being hot. It's a good, cost effective powder but it does burn hot.
Collo Rosso
Member
Make sure your not shaving off coating during seating. I had problems with this till I went to a "M" style expander plug. Makes more of a cup than a bell. For my Dillon 550, DAA "M" funnels do the same.
I generally like MBC bullets, but I've not been happy with some of the hi-tek coated I've gotten in the past. Wet a rag with acetone and rub a bullet. The coating should not soften or come off. Smack the bullet with a hammer. The coating should not crack or flake off. If it does...
Brazos precision 9mm after acetone and hammer treatment.
I generally like MBC bullets, but I've not been happy with some of the hi-tek coated I've gotten in the past. Wet a rag with acetone and rub a bullet. The coating should not soften or come off. Smack the bullet with a hammer. The coating should not crack or flake off. If it does...
Brazos precision 9mm after acetone and hammer treatment.
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Really good point. I'm going to go pull a few bullets and see if the coating is intact.
The lube is advertised as good for 2000+fps in rifles, so it is hard for me to fathom that the lube failed 3" into a 4" trip. And I was wanting to try coated bullets in 44mag later this year.
When using a conventional cast lead bullet/lube, when leading appears at the muzzle end of the barrel, it is most likely the lube "ran out" before bullet exits or didn't do it's job. Perhaps the coating "runs out", but I would consider it is only a 4" barrel. I believe if the bullet's coating was shaved, there would be leading down the entire length of the barrel, but it is definitely something to check. I never got into Hi-Tek coating but I have PCed many handgun and rifle bullets with good success (even in 30 cal rifles running 2,000+ fps and Magnum handguns running 1,300+ fps.). I have gotten fouling, but not leading in a few of my PCed bullets (9mm). I'd be interested is hearing the solution...
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Just wondering, are you using the Brinell 12's or Brinell 18's?
I use the MBC Hitek 12's in my .38 Special loads, and low end .357 loads, 800fps-900fps, The .38 level loads do not give me any leading at all. I use the Hitek 18's in my 9mm, and hotter .357 loads, 1000fps -1200fps. I do get an accumulation of "lead" with the 18's @ 1200fps after about 75 rounds at the upper end of the velocity range, but no loss of accuracy over 100 rounds. At 1000fps, no leading at all. I wasn't shocked or disappointed, as they are about the same as the Berry's plated bullets. They cost less.
I use Red Dot for the mild loads, and Unique or Herco for the 9mm and heavier .357 loads.
Well if not lead, then it is something darn hard to scrub out. I'll take a dental pick to it next time and check more carefully. You have a point because it was deposited like blowby leading instead of streaking.
I'm using the brinnel 18 coated product. The first 3 inches of the barrel are clean - so bullet fit and obturation are fine.
fredj338
Member
I shoot HT coated & also do my own. If the coating is cured properly, should have no issues. Size still matters, so 0.401" would be the minimum. If you shave the coating during seating, you can get leading.
In my exp, HT doesn't make it much past 1500fps before accuracy drops off. I tried some in my 6.8 @ 2000fps, shot patterns at 50y.
I've had good luck.....
....with Missouri's hy tek coating. No leading going on. Mostly .38/.357 and 9mm. Some .44 mag.
....with Missouri's hy tek coating. No leading going on. Mostly .38/.357 and 9mm. Some .44 mag.
rsrocket1
Member
Get yourself a .40 cal bore mop and some real copper Chore Boy. Make sure the bore mop is a snug fit. Wrap a couple of strands around the bore mop and run it in and out of the barrel. The lead will come out as a sparkling dust so be sure to do this outdoors. It should only take a few scrubs and less than a minute.
I've run Missouri, SNS, Brazos and Summers HyTek Bullets over 1500fps in revolvers and lever actions with no leading at all. I did try some Bayou a year or so back and started getting some leading running just over 1000fps. I think I just go a bad batch of bullets as I could scrape the coating off with the edge of a knife. I took the rest of that batch and loaded them really light and had no problems. The main reason I use HyTek is I can load them as hot as jacketed and barrel is just as clean, so I'm betting the OP has either got a bad batch which could happen or the coating is getting scratched during loading.
Hy Tek seems to be consistent....
...however, early on I ordered some powder coated bullets. They were so awful I never ordered powder coated again. Not a fair assessment, but I figured if things could go so badly wrong with the process, I'd try something else. I was so happy with the Hy Tek I never went back.
...however, early on I ordered some powder coated bullets. They were so awful I never ordered powder coated again. Not a fair assessment, but I figured if things could go so badly wrong with the process, I'd try something else. I was so happy with the Hy Tek I never went back.
I pulled the following bullets - coating seems intact:
I dug these out of the berm - notice the lack of engraving and the erosion of the base edges:
Here is leading viewed from the breech:
And viewed from the muzzle:
I believe I have a simple case of undersized bullets. They measure 0.401", but I don't know how to measure a 5 land/groove bore.
I dug these out of the berm - notice the lack of engraving and the erosion of the base edges:
Here is leading viewed from the breech:
And viewed from the muzzle:
I believe I have a simple case of undersized bullets. They measure 0.401", but I don't know how to measure a 5 land/groove bore.
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Great photos of your issue! So, if the bullets aren't shaved as your photos suggest, and you are using the 18 Brinell, then it looks pretty much like blow by. You may have to slow them down a tad. I've had great success with the MBC Hy Tek, 12 Brinell, in .38 (158 g. SWC) up to +P velocities and in .44 Special (240 g. SWC), but no real magnums. Good luck figuring this out and let us know what you find.
scattershot
Member
I had that problem with a recent batch of Bayou Bullets. It wasn't leading, but a coating of the coating material. Very difficult to remove. I contacted the company, excellent CS by the way, and they said was improperly applied coating on the bullets. They replaced them, and all is well.
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