NateTSU Posted October 11, 2014 Share Posted October 11, 2014 (edited) I am currently loading 9mm with 125gr coated from S&S casting and 4.2 grains of Red Dot and Coal of 1.040. I am getting some leading of the last 3/4-1 inch before the muzzle of my factory Glock 34. Does anyone know what is causing this? Edited October 11, 2014 by NateTSU Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted October 11, 2014 Share Posted October 11, 2014 What's your velocity on that load? Link to comment Share on other sites More sharing options...
DougCarden Posted October 11, 2014 Share Posted October 11, 2014 Red Dot is a little too fast for most small case lead loads. Due to the hardness of the bullet it is leading from melting of the base of the bullet instead of swelling out and sealing properly going down the bore. You might try a lead bullet that is a little softer, or try a slower powder like Titegroup, 231, etc......I know...you have red dot and not the others.....You can lower the load but that may not help..... DougC Link to comment Share on other sites More sharing options...
NateTSU Posted October 11, 2014 Author Share Posted October 11, 2014 What's your velocity on that load? I'm not sure I don't have a chrograph, and none of my friends have one either. Link to comment Share on other sites More sharing options...
NateTSU Posted October 11, 2014 Author Share Posted October 11, 2014 (edited) Red Dot is a little too fast for most small case lead loads. Due to the hardness of the bullet it is leading from melting of the base of the bullet instead of swelling out and sealing properly going down the bore. You might try a lead bullet that is a little softer, or try a slower powder like Titegroup, 231, etc......I know...you have red dot and not the others.....You can lower the load but that may not help..... DougC I will try dropping it to 4.0gr and test. And you are right I have been loading red dot out of necessity,it and power pistol been all I have been able to find. Would Power Pistol or Unique be a better option than Red Dot? I have about a pound of all 3 powders left. Edited October 11, 2014 by NateTSU Link to comment Share on other sites More sharing options...
JohnnyD Posted October 11, 2014 Share Posted October 11, 2014 I've had pretty good success with Unique in 9mm. The only bullets I've had issues with are the 125gr SNS Casting Coated bullets of all things. I had the same issue you experience above. I have not tried any of the other brands of Hi-Tek coated bullets. It has worked good with FMJ, Plated, Cast and Powder Coated Cast (currently what I'm using) for me. With the 130ish grain powder coated bullets going just north of 1k fps I can run a couple of patches and have a clean bore after 250 rounds. With the SNS bullets I was busting out the copper brush and going to town to get it cleaned up (I ensured I wasn't swaging them down or scraping coating off when seating). Link to comment Share on other sites More sharing options...
NateTSU Posted October 11, 2014 Author Share Posted October 11, 2014 Same here about the cleaning, I use Montana Extreme Cowboy Action Blend( supposed to help get the lead out) and scrub the sh*t out of it. It turns into a pain in the neck really quickly. Link to comment Share on other sites More sharing options...
fishsticks Posted October 11, 2014 Share Posted October 11, 2014 While I have not personally shot lead or coated lead in a stock glock barrel, I did look into it. There is a school of thought that says a slightly more oversize bullet may better conform to the polyganal rifling and reduce leading. You might try some sized at .357 or .358. Link to comment Share on other sites More sharing options...
njl Posted October 11, 2014 Share Posted October 11, 2014 I'm using Promo ("same as red dot") in .380 without any problems (using Xtreme plated and Bayou coated). Which profile bullet are you using? SNS makes a few different 125s. When I first started loading Precision coated bullets for my .45 Glocks, I found that if any of the bearing surface was above the case mouth, the Glocks would cut through it in the process of chambering (or maybe unchambering) a round. So, I load them short enough to avoid that. Link to comment Share on other sites More sharing options...
NateTSU Posted October 11, 2014 Author Share Posted October 11, 2014 I am shooting the 125gr flat point coated. I have them loaded pretty short at 1.040 not much bearing surface that it is out of the case, I will chamber a few and take a look and see if the coating is being scraped off. I was starting to wonder if I have them seated too deep and causing a pressure spike? Link to comment Share on other sites More sharing options...
Kraj Posted October 11, 2014 Share Posted October 11, 2014 4.3 gn of red dot makes major in 40 with 180 gn bullets in my 35. You could back off and still be OK I would think. Finding a crony would be best though Link to comment Share on other sites More sharing options...
njl Posted October 12, 2014 Share Posted October 12, 2014 That 125gr FP looks like a bullet used for both .38spl and 9mm (just use a different sizing die) and has a crimp groove I'd seat to if I were using them for .38spl. For 9mm, I'd suggest seating them deeper to protect the bearing surface above the crimp groove. Also, I don't see that it's been mentioned yet, so I'll suggest you disassemble one of your loaded rounds and make sure you're not damaging the coating during seating by overdoing the crimp. With coated bullets, in 9mm, I crimp to .379-.380. It's too easy to break through the coating with an overly tight crimp. Link to comment Share on other sites More sharing options...
ZackJones Posted October 12, 2014 Share Posted October 12, 2014 In my M&P Pro 9mm with a Bayou 125g bullet at 1.130 3.8g of Red Dot makes a 130 Avg power factor. Same gun, 125g Blue Bullet, 3.8g of Red Dot at 1.135 makes an Avg PF of 132. I'd back it down a notch or two and see how things go. Link to comment Share on other sites More sharing options...
NateTSU Posted October 12, 2014 Author Share Posted October 12, 2014 (edited) Will pulling the bullet damage the coating? How do you measure the crimp? Just calipers on the case mouth of a loaded round? I am going to load up a test batch at 3.8 and see how those turn out. From the sounds of it so far I have too hot of a charge and possibly am over crimping. Thanks for the tips everybody. Edited October 12, 2014 by NateTSU Link to comment Share on other sites More sharing options...
NateTSU Posted October 12, 2014 Author Share Posted October 12, 2014 I just checked a dozen or so rounds, measures out to .379, pulled one and no damage to the coating at all. I must just have too hot of a load, I will back it down to 3.8 and test those out. Link to comment Share on other sites More sharing options...
Service Desk Posted October 13, 2014 Share Posted October 13, 2014 Lead in the first inch of barrel is pressure leading, lead in the last inch is a sign of bullet lube failure. As has been said before, Red Dot is a bit too fast for 9mm. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted October 13, 2014 Share Posted October 13, 2014 What's your velocity on that load? I don't have a chronograph. You can do quite a bit of damage (and No Good) by NOT having a chrono. Essential part of the reloading game. Link to comment Share on other sites More sharing options...
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