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Author Topic: AA-1680 powder in 45-70  (Read 2625 times)

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Offline doeroller

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AA-1680 powder in 45-70
« on: February 11, 2009, 06:17:56 AM »
   I was looking in the newest Barnes loading manual and noticed that AA-1680 was added to the 45-70 data. The velocity obtained with top loads is very impressive. Velocities well over 2500fps with 250 and 300 gr bullets was published. Has anyone tried this powder in their straight wall case rifles? How does this powder compair with the 4198s, RL-7 etc?
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Offline EsoxLucius

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Re: AA-1680 powder in 45-70
« Reply #1 on: February 12, 2009, 04:30:59 AM »
Accurate 1680 is very similar to the 4198s and Reloder 7 being on the "fast" side of powders for the 45-70.  According burn rate charts, some have Accurate 1680 closer to the 4227s than the 4198s, while others have it closer to the 4198s than the 4227s.  There is no reason why it wouldn't produce impressive velocities in the 45-70 with lighter bullets.  It is a good thing that manufacturers are experimenting with more of the powders that are available, should result in some diamonds in the rough.
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Offline Lone Star

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Re: AA-1680 powder in 45-70
« Reply #2 on: February 13, 2009, 04:26:24 PM »
AA1680 is the 'best' powder in my .375WCF, giving much higher velocities than more "traditional" powders like IMR4198 and RL-7.  Accuracy has been very good too.  I have not tried it in the .45-70 but now I plan to....



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Offline dpe.ahoy

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Re: AA-1680 powder in 45-70
« Reply #3 on: February 20, 2009, 03:48:13 PM »
Lone Star, where did you find load data for the 375?  I'd like to try it in my 38-55's, a Marlin CB and a Handi.  DP
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Offline bishopgrandpa

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Re: AA-1680 powder in 45-70
« Reply #4 on: February 23, 2009, 05:23:42 AM »
From Hornady Tech Service:
450 Marlin 1895 Marlin Guide Gun (18.5")
Primer WLR COL 2.590  325 Flex tip
AA1680 1700 1750 1800 1850 1900 1950 2000 2050 2100
            40.2 41.1  42.0 43.0  43.9  44.8  45.8 46.7  47.7
E mail them and they will send you a sheet. Very accomodating folks there.
45-70 22" Marlin 1895  325 Flex tip COL 2.590
 AA 1680        1800     2150
                     42.2     51.4
Beware of which cases you are using. Hope this helps.
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Offline Lone Star

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Re: AA-1680 powder in 45-70
« Reply #5 on: February 26, 2009, 03:38:17 PM »
Accurate has plenty of AA1680 data for the .375WCF in their #2 Manual.  But none for the .38-55.



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