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357 Mag 125 Grain Gold Dot With Blue Dot Powder

Written By Wednesday, July 13, 2022 Add Comment Edit
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  1. I would like to try some loads using Hornady's 180gr HP/XTP over Blue Dot. Has anyone a favorite load using these two components they would be willing to share? I normally use Lyman's 49th but it shows Hornady's 180gr SIL not the HP/XTP. Same weight, if the OALs are similar should I just use that data?

    I sent Hornady an email and I got a response back, "Load data is in our newest book (9th Edition), you need to buy it." LOL

    The tech went so far as to say Lyman's 49th is old enough that I shouldn't trust the data.

    Grumpy

  2. IMO and only my opinion, since the bullet depth is set by the manufacturer in the form of a cannalure I see no reason why you can't use hat data. That's why they supply starting data, start there and work up.

    Handloads.com shows a charge range of 8.7gr to 9.7gr Blue Dot under a 180gr JFP bullet. You can use that data to crosscheck against what you have.

    NOTE: Always check data you get on a forum for yourself. Mistakes can and will happen when writing numbers.

  3. Arch hit the nail on the head.

    GS

  4. Arch, you are 100% correct. Data I get on forums is used to compare with what I can fine on manufacturers sites and printed data. Very few sites or sources list the exact same data. When compared to each other they can point me in the right direction. As always, start low and work up. :)

    Thanks,
    Grumpy

  5. I have Hornady's 7th and they have no info for Blue Dot and their 180 gr XTP or the CL-SIL. They do show the exact same powder charges and COLs for both the XTP and the CL-SIL in the recipes tho. This tells me info in Lymans(it's not that old) for the CL-SIL should be safe. The tech may have been advising you about older manuals using Blue Dot for 125 gr loads in .357.
  6. M1key

    M1key Member

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    ^^^yes

    125gr bullets are not recommended with Blue Dot

    M

  7. A subscription to www.loaddata.com is well worth the money, if a person doesn't want to buy printed material such as Lymans 49th reloading handbook.
  8. They most have added BD to the new manual as it is not in the 8th edition
    Sorry
  9. Look in your 47th edition?
  10. LOTSA problems with Blue Dot in the 357MAG cartridge over the years. Go talk to Alliant.
  11. Alliant won't tell you what the problems are.. The 125 warning makes no sense since you can load 110 and 140 gr....FWIW, I loaded thousands of 125's with Blue Dot with great results before the warning came out.
  12. Yeah right. Hornady's 357 data in their latest edition is the same as their previous edition with the exception that they added 300-MP to two bullet weights and dropped H4227 altogether. Hornady's data is not any newer than the Lyman 49th.

    As other's have said Hornady lists both of their 180gr jacketed bullets with the same data so Lyman's data for one will work with the other. Hornady lists an OAL of 1.590" with the JTC-SIL and XTP both.

    The 9th edition does not pair Blue Dot with any bullet in 357 Magnum. Their 4th Edition gives a start of 8.9gr and a max of 9.6gr with the 180gr JTC-SIL and Blue Dot if this helps. Be aware that some of the data in the 4th Edition is higher than in their 9th Edition. With AA#9 and IMR 4227 it's 2.5gr to 2.8gr less in the 9th Edition! Data for Alliant's 2400 went up a little though. H110/296 is a couple tenths higher with the 180gr bullets but down a couple with 158gr bullets between the two editions. Be careful and don't toss your Lyman 49th just yet.

  13. That's the nice thing about loaddata.com, it's a compilation of every load ever listed in Rifle or Handloader magazine, plus lots of data from the powder and bullet companies.
    Well worth the expense ,especially these days when a person may or may not be able to find your age old trusted powder.
  14. FWIW, a few years ago I bought some Sierra bullets that were made after the Sierra manual I had and I had no data for them. When I emailed Sierra about data they emailed me a scanned copy of the page from their latest edition with the data I needed. A little difference in customer service I'd say.
  15. Lyman's shows a OAL of 1.580" for both. Judging from where the cannelure hits the new Starline brass 1.590" would be VERY close to the bottom
    of it. However that's measured with my not-so expensive dial calipers.

    Grumpy

  16. I just loaded 140gr XTPs in new Starline brass to 1.590". The case mouth was close to the bottom of the cannelure. 1.580" should be fine, especially if the data you are using loaded to that length. Or you could split the difference and load to 1.585".

    Nosler doesn't even give an OAL with its data. They say to seat the bullets until the case mouth is in the middle of the cannelure. IIRC Hornady used to give a shorter OAL with its bullets than they do now. Seating depth isn't nearly as big an issue in 357 Magnum as it is in autoloader cartridges like 9mm and 40 S&W. As long as you're not right at max you're golden.

  17. I loaded some 140 gr xtp's and blue dot with no issues. I have read the warnings and they seem to be for the 125 grainers only. I use Lyman 49 as my main reference point and it has been good to me. There is comparable data on blue dot out there.

    FWIW I really like 2400 in the .357 magnum.

  18. I tried 2400 years ago and couldn't get it to shoot faster than Blue Dot with published data back then. The latest data with 2400 looks promising though. Seems like just about everyone's numbers with that powder have come up. I got hooked on N110 in 357, burned through probably 12 pounds of the stuff. It's hard to find now and really pricey. I'm looking for a replacement for it now but powder and bullets have been hard to come by. Will probably settle on 296 or #9, if components ever become readily available again...
  19. Power Pistol is a good option for stout .357 loads.
  20. I shot a bit of BD through a Colt Trooper .357 mag. 125gr jacketed were inconsistent, 158gr jacketed were OK, 180gr jacketed were very good.
  21. I guess that's one of the reasons there are so many different powders out there. some powders will work with most bullet types and weights but powders are seldom "one size (powder) fits all."

    You can find loads for just about any pistol cartridge using Unique. However some of them are far from ideal. It (Unique) might not be the fastest nor the cleanest, but it will work. A re-loader must sift through the different data sources to find out what powders work best for the specific caliber, barrel length, and bullet weight they want to use. Still if your only goal is to get lead down range and the distance is not too great there are many choices.

    Grumpy

  22. Unless I'm mistaken 2400 is the powder that created the 357 magnum.
  23. Blue Dot in .357

    I switched to Power Pistol after the scare about Blue Dot in certain. 357 Mag loads. I know it only concerned 125 grain loads but since that was the only .357 weight I load, I quit using it altogether. Power Pistol works fine for me except for the fireballs.:fire:

  24. I've used 180gn XTPs with 8.9gn BD, Win SP primer, Remington brass,and an OAL of 1.58". Shot out of a GP100 6". I lost interest in that bullet weight. I get better performance from the lighter xtps. They are punchy though.
  25. I started with 8.5gr of BD under the 180gr HP/XTP and the 180gr SIL at 1.579" OAL. I'll run a few over my chrono to see what velocity I get.

    Grumpy

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Source: https://www.thehighroad.org/index.php?threads%2Fblue-dot-in-the-357-magnum.743057%2F

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