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New IMR 7977 power!!
#5768935
06/01/15 07:02 PM
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Joined: Sep 2009
Posts: 18,907
ChadTRG42
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I finally was able to put this new powder through it's paces with a 300 WM and 208 A-max with a customer's rifle for a custom load work up. This new IMR 7977 powder is similar in burn rate to H1000. 7977 did very well, and shot very good. I was able to get 2888 fps, low extreme spreads with no pressure signs in a 26" barrel 300 WM with 208 A-max, which is right in line with H1000. I think this IMR 7977 is a little faster burning than H1000, but for sure slower than 4831. I needed a few grains less to achieve the same speeds as H1000. With H1000 being hard to find, I'd recommend giving this powder a look for applications with 4831, R25, and H1000 reloading data (or any similar burn rates). It is a temp insensitive powder and has the copper fouling reducer built into the powder. I am adding this powder to my inventory to load from.
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Re: New IMR 7977 power!!
[Re: ChadTRG42]
#5768969
06/01/15 07:21 PM
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Joined: Oct 2004
Posts: 39,481
redchevy
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It's hell eatin em live
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Re: New IMR 7977 power!!
[Re: ChadTRG42]
#5769066
06/01/15 08:37 PM
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Joined: Jan 2011
Posts: 46,950
Gravytrain
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Does it meter like varget (eg not that good)?
Upon us all, upon us all, a little rain must fall
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Re: New IMR 7977 power!!
[Re: ChadTRG42]
#5769110
06/01/15 09:00 PM
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Joined: May 2011
Posts: 899
jeff1383
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Chad do you think this would be a suitable replacement for h1000/retumbo for the 338 caliber family??
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Re: New IMR 7977 power!!
[Re: Gravytrain]
#5769173
06/01/15 09:42 PM
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Joined: Sep 2009
Posts: 18,907
ChadTRG42
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Does it meter like varget (eg not that good)? I am using it in a RCBS Chargemaster to throw the initial charge and trickling up on a digital scale. It meters fine for that. In a powder dump, I'm not sure. The kernels are your typical extruded powder.
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Re: New IMR 7977 power!!
[Re: jeff1383]
#5769180
06/01/15 09:47 PM
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Joined: Sep 2009
Posts: 18,907
ChadTRG42
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Chad do you think this would be a suitable replacement for h1000/retumbo for the 338 caliber family?? Yes. My data shows it is within a grain or two less than H1000 for the same speeds with the 208 A-max. Any data with H1000, R25, 4831, etc, would be a great replacement or a good secondary, backup powder. I will always use H1000. But when I can not get H1000, this IMR 7977 will be the go to powder for me. I am always needing to have good powders I can rely on. And when you run out of your main powder, you must have a second powder to go to. This powder will be another choice, instead of H1000, to choose from when starting a load work up for customers.
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Re: New IMR 7977 power!!
[Re: ChadTRG42]
#5769237
06/01/15 10:25 PM
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Joined: May 2011
Posts: 899
jeff1383
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Thanks for the heads up. I'm in the process of gathering components for my 338nm build that's underway. I can't find h1000 but have stumbled across 8lb jugs of ir 7977.
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Re: New IMR 7977 power!!
[Re: ChadTRG42]
#5769242
06/01/15 10:27 PM
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Joined: Sep 2009
Posts: 18,907
ChadTRG42
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It should do fine for that.
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Re: New IMR 7977 power!!
[Re: ChadTRG42]
#5769500
06/02/15 12:56 AM
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Joined: Feb 2015
Posts: 473
Beaubien
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Thanks Chad, will check it out.
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Re: New IMR 7977 power!!
[Re: ChadTRG42]
#5770909
06/02/15 09:41 PM
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Joined: Nov 2013
Posts: 1,102
Bbear
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Was thinking of trying this in my 26" 264 Win Mag. Think it might work? I've done just a little work-up with the H1000 I have, just not seeing any of that on the shelves.
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Pay it forward - Kids are the future.
Rifles are similar to boats and young women...there's no end to how much money you can pour into them without making them any more useful.
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Re: New IMR 7977 power!!
[Re: ChadTRG42]
#5770930
06/02/15 10:00 PM
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Joined: Sep 2009
Posts: 18,907
ChadTRG42
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Yes, it should be good in a 264 WM.
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Re: New IMR 7977 power!!
[Re: ChadTRG42]
#5770978
06/02/15 10:32 PM
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Joined: Sep 2006
Posts: 32,442
kmon11
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junior
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Have thought about trying 7977 in the 6.5-284, but will probably wait until the supply of H4831 is more depleted.
4166 is catching my attention though for several other rounds.
lf the saying "Liar, Liar your pants on fire" were true Mainstream news might be fun to watch
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