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| IMR 7828 would be a good place to start. I would be more concerned about the groups it will shoot than the speed |
| | | Posts: 2443 | Location: manitoba canada | Registered: 01 March 2001 | 
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| I don't have any experience with the 300 Wby, but do with 300 Win Mag. I would think that H1000 and Retumbo would also be good choices. H1000 works great in the 300 Win Mag with 180gr bullets.
We contend that for a nation to try to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle.
--Winston Churchill
"Oh, nothing Mom, just pounding primers with a hammer ..."
Politics is supposed to be the second oldest profession. I have come to realize that it bears a very close resemblance to the first.
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| 2950-2975 from two 24" 700s in .300 Roy. About 1" to 1.25" for 5 at 100 yds, consistent. Remington cases, WLRM, IMR 7828. 200 gr Partitions, instead of Accubonds b/c the only BT bullets that shoot well in any of our 3 .300 Roys have been monometal TTSX. They shoot great, BTW.
Tried faster burn rates (IMR 4350, IMR 4831, new H4831) but end up burning more powder to have a .300 Win. |
| | | Posts: 670 | Location: Dover-Foxcroft, ME | Registered: 25 May 2002 |
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| Great, thanks for the info! |
| | | Posts: 402 | Location: Colorado Springs, Colorado | Registered: 15 January 2005 |
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| IMR-7828 is my go to powder for the 300 Wby. but my last Speer 200 grain loads were with H-870 to the tune of 93 grains. That gave me 2978 fps out of my 26" barrel Mark V. 1" groups at 100. |
| | | Posts: 1332 | Location: Western NC | Registered: 08 January 2005 |
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