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300 Weatherby 180 grain at 3200 plus

 
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  #1  
Old 09-28-2009, 10:02 PM
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300 Weatherby 180 grain at 3200 plus

What powder is most likely to get over 3200fps. H1000, Retumbo, RL19, RL22, IMR 4831, or IMR 4350. Seems like the slowest powder would, but the Nosler manual seems to favor RL19. I am reloading for a friend, who says his 26" MarkV groups best above 3200 with 180grainers. We are using accubonds and Btips. Also have Weatherby Brass, and Rem 9.5's or Fed 215's.
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  #2  
Old 09-29-2009, 12:49 AM
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Re: 300 Weatherby 180 grain at 3200 plus

Quote:
Quote:
Originally Posted by bkondeff View Post
What powder is most likely to get over 3200fps. H1000, Retumbo, RL19, RL22, IMR 4831, or IMR 4350. Seems like the slowest powder would, but the Nosler manual seems to favor RL19. I am reloading for a friend, who says his 26" MarkV groups best above 3200 with 180grainers. We are using accubonds and Btips. Also have Weatherby Brass, and Rem 9.5's or Fed 215's.
Nosler shows H1000 with a slight edge in velocity over RL22. It's also more temp stable than 22. My guess would be Retumbo would beat H1000 in that velocity range. Either Retumbo or H1000 should get you close to 3200 in a 26" tube or maybe better.

-MR

Last edited by MontanaRifleman; 09-29-2009 at 12:53 AM.
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Old 09-29-2009, 04:22 AM
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Re: 300 Weatherby 180 grain at 3200 plus

Quote:
Originally Posted by bkondeff View Post
What powder is most likely to get over 3200fps. H1000, Retumbo, RL19, RL22, IMR 4831, or IMR 4350. Seems like the slowest powder would, but the Nosler manual seems to favor RL19. I am reloading for a friend, who says his 26" MarkV groups best above 3200 with 180grainers. We are using accubonds and Btips. Also have Weatherby Brass, and Rem 9.5's or Fed 215's.
I wouldn't be using any of the above powders.
The best powder in both the 300WinMag and Weathery is RE25, it can give you velocities in the range of 3400fps with safe pressures!
A good starting load is 83gr's, max is 87gr's. Fed215's seem to work the best in my rifles.
Retumbo and RE25 use almost exact weight charges, you can use the same starting loads with either, work up carefully and stop at the first signs of pressure, but I doubt you'll see any with either powder.
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Old 09-29-2009, 04:32 AM
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Re: 300 Weatherby 180 grain at 3200 plus

I would work a load up using Retumbo. It is quickly becoming my favorite powder.
I use it in my 25-06, 7STW, 300WM, 300 JAZZ. It has given me more velocity and lower extreme spreads on a regular basis. As stated it is also temperature stable.
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  #5  
Old 09-29-2009, 07:25 AM
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Re: 300 Weatherby 180 grain at 3200 plus

Met a guy at the range the other day and he had loaded RL25 in his 7RM and had gotgood velocoities in the past with it. He loaded up a 100 and was at the range Sat when it was about 80. Was getting a stiff bolt on every shot. He asked me about the powder before he mentioned about the stiff bolt, and I told him I had heard it gave good velocoities but was (edit) not very temp stable (here on this site and from some friends who have used it). He said yeah, and told me what was happening. He wasn't a happy camper because this was going to be his antelope load. Had to go home and pull every bullet and start over. I recommended Retumbo and H1000. I wont use RL22 or RL25 because of the temp thing.

Just my $.02

-MR

Last edited by MontanaRifleman; 09-29-2009 at 09:14 PM.
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  #6  
Old 09-29-2009, 07:58 PM
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Re: 300 Weatherby 180 grain at 3200 plus

Anyone have any velocity readings for me at given charge weights. I would love to compare to other Weatherby rifles especially given their similar jump to the lands issues.
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  #7  
Old 09-30-2009, 05:17 AM
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Re: 300 Weatherby 180 grain at 3200 plus

my 300 wby has a 24 in bbl . 87.8 grain of H1000 , 215 primer , rem brass , 180 accubond , 3168 FPS .


same gun . 82.5 grain IMR7828 , 215 primer , rem brass , 180 accubond , 3150 FPS. Jim
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