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Old November 14, 2013, 11:49 AM   #1
1Victor30
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124gr CMJ + Blue Dot

Used up all my 115gr. FMJ, so an now using Montana Gold 124gr CMJ. I know Blue Dot is not the best powder for 9mm, but I have some and want to use it up. When I look for data on 124gr and Blue Dot, the figures are all over the map!. Even Alliant had basically the same load for 115gr FMJ and 124gr FMJ. I thought the heavier the bullet, the less powder. I have used 7.8gr of BD under a 115gr FMJ bullet and got good results. Thought about starting at 7.0 and working up for the 124gr. Other "recipes" I have seen have loads as low as 5.8 for the 124gr FMJ, although not from manufacturers. Plan on getting a Chrono, but that will have to wait until the new year. Suggestions?

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Old November 14, 2013, 02:06 PM   #2
andyjr11
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I love Blue Dot in my 9mm. I pretty much only use hard cast lead bullets and I put a 124 gr over 6.6 gr of Blue Dot.

To me it seems like a pretty stout load, don't know the speed but I know the fill. Shoots pretty accurate and runs well in all my 9's.
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Old November 14, 2013, 02:54 PM   #3
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Pressure is partly a function of bullet weight, but it's also partly a function of the amount of powder space under the bullet. If the 124 grain bullet at Alliant's site is a shorter shape than the 115 grain bullet mentioned (say, a 124 grain TC vs. a 115 grain RNFMJ), then the added powder space may make up for the charge not changing.
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Old November 14, 2013, 02:58 PM   #4
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How much BlueDot can you fit in a 9mm case if you fill it all the way to the top? (I doubt you can overcharge a 9mm with BD.)
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Old November 14, 2013, 03:44 PM   #5
1Victor30
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The 115gr FMJ I used were .558(Montana Gold) and .589(Winchester). The Montana Gold 124gr. FMJ is .587 and the MG CMJ are .591 The difference between them is not that much.
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Old November 14, 2013, 04:02 PM   #6
TimSr
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I personally think Blue Dot is the greatest for 9mm! It works best in a full case or compressed.

Quote:
How much BlueDot can you fit in a 9mm case if you fill it all the way to the top? (I doubt you can overcharge a 9mm with BD.
I would agree.

I load 8.0 gr under a cast 125gr SWC and it filled almost to the brim and I was doing 115 JHP over 8.4 gr and it pretty much filled her up.
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Old November 14, 2013, 05:19 PM   #7
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I've never done it, but Blue Dot should work fairly well with 124's. But I believe it would work even better with 147's. In general, BD likes heavy bullets.
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Old November 14, 2013, 06:43 PM   #8
1Victor30
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As a test to see how my XD-9 does, I loaded up 10 rounds each of 124gr Montana Gold FMJ over 7.2, 7.4 & 7.6 grains of Blue Dot. Just want to see how they cycle. My priority after the first of the year is to get a chronograph.

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Old November 14, 2013, 06:57 PM   #9
Nick_C_S
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Sierra 5th peaks at 7.6g (125g bullet)

Hornady 9th peaks at 6.7g (odd - must be a short COL or something)

Speer #14 peaks at 7.9g

So you're right in the neighborhood. They'll all cycle just fine. And they're going to make for a better round than the 115's you had.

The primary challenge with BD is to get it to burn clean.
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Old November 15, 2013, 12:07 AM   #10
1Victor30
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Thanks, Nick. Think I will stick with the 124gr because of the type of powder I have at the moment. I still have some Bullseye that I might use on Berrys 115gr RN. Got a box of those a while back and have not worked up any loads with them as yet. My understanding with the Berrys is to use the low to mid range jacketed data, so 4.2 to 4.4 might be what I will try.

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Old November 15, 2013, 07:54 AM   #11
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I can attest that Blue Dot works excellent in 115, 120, and 125gr bullets, cast or jacketed. I keep hearing about it not being clean burning, but I cannot seem to find a dirty Blue Dot load. I only use it in case capacity type loads, which I assume is the key. You'll have a hard time finding a Blue Dot load for 9mm that has vacant space.
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