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the real fredneck
V.I.P. Member
Posts: 933
(4/7/02 11:45:15 am)
Reply | Edit | Del All IMR 7828
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anyone have any experience with this powder? found some on the discount table and bought a pound for 7mmRM was told it was for large capacity cases but the only data I can find is for 175 gr bullets, have been using 140 gr Nosler BT's, was I only told half the story that it requires large cases and heavy bullets?

loader44
V.I.P. Member
Posts: 166
(4/7/02 2:13:52 pm)
Reply | Edit | Del IMR7828
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I found one reference for the 140gr bullet in my " Lyman " reloading book.

IMR7828,
Starting grains - 67.0
fps 2860
pressure 37500

MAX LOAD 74.5gr
fps 3258
pressure 52000

OAL 3.290"


Hope this helps.

loader44.

the real fredneck
V.I.P. Member
Posts: 936
(4/7/02 2:48:14 pm)
Reply | Edit | Del Re: IMR7828
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much obliged, loader44
Thanks!

loader44
V.I.P. Member
Posts: 167
(4/7/02 8:07:23 pm)
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Your Welcome.

loader44.

kdub01
*TFF Senior Staff*
Posts: 469
(4/7/02 8:09:13 pm)
Reply | Edit | Del Re: IMR7828
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Got almost a full pound of the IMR 7828 I bought several years ago for the 7MM Rem Mag and the 7MM Dakota. Didn't like it as it was too slow and couldn't fill the cases full enough to get the velocity/pressure where it should be. Found that Alliant RL-25 does a much better job.

Hodgdon has a new powder out now for the short, fat magnum type cases - where you have lots of case capacity for the size of bore - that's supposed to be a maiden's prayer to handloaders of magnum cases.

the real fredneck
V.I.P. Member
Posts: 939
(4/7/02 10:29:16 pm)
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kdub
so is this stuff any good for any "normal" calibers? or is it just for African bearilla rounds and anti-aircraft shells?

Hangfire
Member
Posts: 45
(4/8/02 10:01:04 am)
Reply | Edit | Del Re: IMR7828
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Fred,
My uncle uses 7828 for his 300 win mag, and swears by it. His rifle also has a 26 inch barrel. It's a slower burning powder that burns all the way out, which it why it probably works well in his long barreled magnum. I like IMR4350 myself. I've always wanted to get them side by side on a chronograph and see if his performs better, like he always tells me. I always tell him that my elk looks just as dead hanging next to his elk.
Hangfire

kdub01
*TFF Senior Staff*
Posts: 474
(4/8/02 10:53:20 pm)
Reply | Edit | Del Re: IMR7828
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Naw, Fred -

It's too slow burning for anything that takes less than 65 grain capacity, or so. The larger the capacity, the better it would be. There ARE slower powders than 7828, but not a whole bunch!

the real fredneck
V.I.P. Member
Posts: 944
(4/9/02 9:02:45 pm)
Reply | Edit | Del Re: IMR7828
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Yeah Hangfire I've used 4350 for years in 7RM but went to the store and they were out and had the 7828 on the bargain bench for $9.95 so it was a pretty easy sale, just wanted to get some opinions and info before trying it out

jer2003
Member
Posts: 6
(4/13/02 6:54:28 pm)
Reply | Edit | Del Re: IMR7828
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IMR 7828 is supposed to be slightly slower than H 4831. You could use 4831 data and work up until you found the best load. I would guess that you could use a grain or maybe two above H 4831.
Start with a starting load of 4831, and I suspect you will find it a good powder for 160 gr bullets and up for the 7 MM RM.

I use Norma 205, which isn't available, in my magnums and for top loads in the .270. I think it is about the burning rate of 7828. N 205 is more dense, however.

Jerry

kdub01
*TFF Senior Staff*
Posts: 500
(4/13/02 10:10:00 pm)
Reply | Edit | Del Re: IMR7828
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According to my burn rate chart, it goes:

IMR 4831
Hodgdon H4831/HSC4831
Alliant RL-22 (Made by Norma, same powder as Norma 205)
VihtaVuori N565
VihtaVuori N165
IMR 7828

Then, there are a dozen or so slower than 7828.


jer2003
Member
Posts: 11
(4/13/02 11:44:10 pm)
Reply | Edit | Del Re: IMR7828
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In my youth H 4831 was the slowest readily available powder. At that time it was surplus. Then H 870 and another about as slow became available.
H 870 was too slow to be practical in the short magnums. I decided I would try it in a 300 WM behind 200 grain Speer bullets. If I recall correctly I used 90 grains or so of H 870. It filled the case.

It kicked too hard for me to experiment with it so I went back to H 4831 and 180 gr bullets. My rifle was the old Sako magnum Mauser which I had rechambered from 300 H&H to the WBY, by a gunsmith in Anchorage, I believe his name was Jack Shine. That was about 1961. I paid $136 for it at Caribou's. They had one more, and I wish I had bought it and kept it original. In those days the M 70 std or fwt sold for $103 in the PX. OH WELL.

Jerry

kdub01
*TFF Senior Staff*
Posts: 506
(4/14/02 12:45:18 am)
Reply | Edit | Del Re: IMR7828
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Sounds like we've been kicking dirt clods about the same length of time, Jer -

Bought a Mod 70 standard in 300 H&H used, back in '61 (lost it in a canoeing accident in Canada in '64). That's the one that started me down the reloading road. Have had dozens of rifles since, but that ol' stomper still has a spot in my heart! Present Mod 70 to reside in safe is a pre-war made (1939) standard grade in ".30 Gov't" caliber!
 
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