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Max barrel length for 338 Lapua and 300RUM

 
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  #8  
Old 03-30-2005, 06:44 PM
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Join Date: Nov 2004
Location: GF Montana
Posts: 467
Re: Max barrel length for 338 Lapua and 300RUM

Differential Velocity gain
Data From Daniel Lilja, shows diminishing returns. Dan said he would send me the code he wrote to generate the data so I could go shorter than 28" (as a lot of 50 folks are going much shorter)

As you can see, once you get out to 40" you only gain 10 FPS with each addition inch.

Lilja on barrel len vs vel
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  #9  
Old 03-30-2005, 07:19 PM
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Join Date: Aug 2004
Location: utah
Posts: 302
Re: Max barrel length for 338 Lapua and 300RUM

I have a 338 Lapua Imp. with a 36" barrel and the only real advantage is that I can set the barrel back a few inch's after a 1000 rounds and not give up that much velocity, not worried too much with barrel whip 1.45" with barrel block.
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