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 300 Win Mag and IMR 7977
#7847774
05/22/20 05:16 PM
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Joined: Jul 2006
Posts: 126
Halligan1
OP
Woodsman
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OP
Woodsman
Joined: Jul 2006
Posts: 126 |
I’m finding limited data for loading relatively lighter bullets (178 grain ELD-X) in .300 win mag using IMR 7977.
Anyone have any pet loads for this combo? (I’m trying to burn up the 178s I have on hand before switching
to a heavier bullet.)
Thanks for the help!
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Re: 300 Win Mag and IMR 7977
[Re: Halligan1]
#7847807
05/22/20 06:00 PM
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Joined: Dec 2008
Posts: 41,171
J.G.
THF Celebrity
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THF Celebrity
Joined: Dec 2008
Posts: 41,171 |
Start at 73.0 gr.
Climb up in .4 gr increments until it shoots good, looking for pressure on the way.
Bet it ends up being quite full of powder, when it starts to shoot best.
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Re: 300 Win Mag and IMR 7977
[Re: Halligan1]
#7847877
05/22/20 07:31 PM
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Joined: Sep 2009
Posts: 18,951
ChadTRG42
THF Celebrity
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THF Celebrity
Joined: Sep 2009
Posts: 18,951 |
I’m finding limited data for loading relatively lighter bullets (178 grain ELD-X) in .300 win mag using IMR 7977.
Thanks for the help! I don't have any "pet" loads, but 7977 is slightly slower burning than H1000 is in my testing. So, copying H1000 data is close, and 7977 should be slightly higher. I've seen about 79 to 80 grains as max with the 180 grain bullets. But this depends on your seating depth, brand of brass used, and bullet choice. The longer you seat it out, the more powder you can use before pressure.
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Re: 300 Win Mag and IMR 7977
[Re: ChadTRG42]
#7848080
05/22/20 10:14 PM
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Joined: Mar 2012
Posts: 3,809
Cleric
Extreme Tracker
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Extreme Tracker
Joined: Mar 2012
Posts: 3,809 |
I’m finding limited data for loading relatively lighter bullets (178 grain ELD-X) in .300 win mag using IMR 7977.
Thanks for the help! I don't have any "pet" loads, but 7977 is slightly slower burning than H1000 is in my testing. So, copying H1000 data is close, and 7977 should be slightly higher. I've seen about 79 to 80 grains as max with the 180 grain bullets. But this depends on your seating depth, brand of brass used, and bullet choice. The longer you seat it out, the more powder you can use before pressure. Wanna say this is close to where I was but I used 190 ablr, but it was a stout load
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Re: 300 Win Mag and IMR 7977
[Re: Halligan1]
#7848350
05/23/20 02:44 AM
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Joined: Jul 2006
Posts: 126
Halligan1
OP
Woodsman
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OP
Woodsman
Joined: Jul 2006
Posts: 126 |
Thanks for the replies and the info!
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