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.338 Lapua - H50BMG Loading Data?

 
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  #1  
Old 03-06-2005, 11:59 PM
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.338 Lapua - H50BMG Loading Data?

250 and 300 SMK's? Thanks in advance for any links or data. This powder works really well in my 300 RUM with heavy bullets, I have about 30 lbs of it so I thought I might give it a try in the .338 Lapua.
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Old 03-07-2005, 07:12 AM
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Re: .338 Lapua - H50BMG Loading Data?

I have just begun to load for a 300 RUM. Many recommend Retumbo, but H50BMG should fill the case. What's your load data in the 300?
db
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Old 03-07-2005, 04:49 PM
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Re: .338 Lapua - H50BMG Loading Data?

103-108 gr. with a 180 SMK. My best accuracy was 105 grains in this Rem factory barrel.
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Old 03-07-2005, 07:45 PM
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Re: .338 Lapua - H50BMG Loading Data?

Thanks Don, I will be working in the 200-220grn bullet range. I chronographed some 216s with 102grns H50BMG at a little over 3000fps with a Lilja 3 groove so I guess I'm in the ballpark so to speak.
db
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Old 03-07-2005, 11:15 PM
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Re: .338 Lapua - H50BMG Loading Data?

Don

I have tried H-50bmg with my lapua with 30" barrel. For me it filled the case up before i reached any kind of pressure. I couldn't reach that point and not be able to fit the powder in the case. Really to slow of powder and i don't think all the powder was being ignited. This is all with the 300gr sierra bullet. My overall length is right around 3.9". I think i am going to try the H-50 with The 300gr. wildcat bullet as it seems to have a longer bearing surface than the Sierra's thinking that the longer barrel surface will help create more friction with the bullet to help burn the powder better to get better velocity.Might be thinking wrong.

I have had the best luck with Retumbo.

Matt
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Old 03-08-2005, 12:50 AM
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Re: .338 Lapua - H50BMG Loading Data?

Nice to see you here Don. Message to everyone else, Don's the best scope guy if you need a new scope or have questions.

I have 3 new custom Lilja/Kirby RUMS with heavy Lilja 30" SS barrels - I'd love a heads up on H50 load data for these guns.

I also need the ultimate BC bullet for my 375 RUM so I can compete with Kirbys awesome 338 Kahn. Now that Richard Graves/Wildcat Bullets wildcatbullets@hotmail.com is making 375 pills, I might just have a chance [img]/ubbthreads/images/graemlins/smile.gif[/img]
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Old 03-08-2005, 08:50 AM
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Re: .338 Lapua - H50BMG Loading Data?

H50BMG is really too slow for Lapua with 250 and 300 gr bullets. The slowest powder that is published is AA-8700 and H870.
I too would point you towards Retumbo. Perfect burn rate for this application.
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