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338 lapua MV

 
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  #1  
Old 04-09-2011, 05:32 PM
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Location: Prince George B.C.
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338 lapua MV

Am still waiting for my new toy to show up and starting to get antsy, been going over some possible loads and I am having trouble believing the numbers I got from the Hodgesons load calculator page. It shows that a 92 gr load of H-1000 and a 300 gr bullet is giving me a muzzle velocity of 2590, that seems pretty slow to me. I will be shooting a Savage 110ba with the 26" 1 in 9 twist, 300 gr SMK's, federal large magnum primers, Lapua brass and 92 gr of h-1000. If someone could tell me wether I am on the right track here or not and what kind of real world velocities I can expect that would be great. Thanks in advance.

Bryan
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Old 04-09-2011, 10:39 PM
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Re: 338 lapua MV

You should be able to squeeze a little more velocity out of that barrel. Just watch for pressure signs. The issue is the 26" barrel, this is where you are losing some of your velocity. Once you get your rifle see what the real numbers are and hopefully you can get up to at least 2800fps.
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Old 04-09-2011, 10:48 PM
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Re: 338 lapua MV

2750 to 2800 was kind of the range that I was thinking I should be able to get out of that combo. I knew that the weak link was that 26" barrel. Am planning on swapping it out to a 32 or maybe a little longer one day when the wife isn't looking lol
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Old 04-10-2011, 10:25 AM
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Re: 338 lapua MV

I can get 2850 with 92 gr h1000 with my 28" broughton barrel. If you find you are not getting the speed you want try some Retumbo. It should gain you a little more speed.
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Old 04-10-2011, 10:46 AM
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Re: 338 lapua MV

I have a 30" Rock Creek ABS carbon wrapped barrel and 92 grains of H-1000 in Lapua cases lit by Federal 215M primers gives me 2800 FPS. 94 grains gives little velocity increase and leaves shiny spots on the case head indicating excess pressure
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  #6  
Old 04-12-2011, 11:47 PM
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Re: 338 lapua MV

Same load, min spec chamber, 27" Bartlein 5R, 2895 fps.
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  #7  
Old 11-01-2011, 04:46 PM
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Re: 338 lapua MV

Hi Bryan,

I am using a DSR-1 and the 300 SMKs. I have tried the Lapua Scenars and Lockbase 250's over three different powders. Every single one has been well under the tables velocities.

My current load of 92 grains VV N570, 300 SMKs is 0.3gn over the tabled VV max load of 91.7gns. VV claims 2710 f/s. I am getting 2582 f/s and showing the first signs of pressure. The bolt camming on a few rounds was a little tight so I will back off to 91.7 and stay there.

This load is the closest I have got to the VV tabled velocities (4.7% low). Not too bad really, until you consider than VV use EXACTLY the same test barrel as the DSR-1 is fitted with. The question is "Where the hell do they shoot these numbers? On the top of Mount Everest?"

My conclusion is that the numbers are pretty much stacked to support the hype that this caliber has generated.

The rifle/load accuracy is extremely good. The attached photo was shot using just the bipod, with variable low cross winds. I am a long way out of practice, so I think I can get a bit better.
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338 lapua MV-900m_plate.jpg  
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