7mm-08 barrel length

This is a discussion on 7mm-08 barrel length within the Rifles forums, part of the Sniping Related category; I am going to be aquiring a SPS Varmint in 7mm-08 with a 26 inch barrel. I want to shoot the 162 amax out of ...

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  1. #1
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    7mm-08 barrel length

    I am going to be aquiring a SPS Varmint in 7mm-08 with a 26 inch barrel. I want to shoot the 162 amax out of it or the 168 vld. If I cut the barrel down, how short can I cut it and still get 2700 fps? I would like to cut it down to 20 inches. Anyone shooting a 7mm-08 with either of these bullets?

    Thanks

    Justin

  2. #2
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    Well you have to figure out a load first, generally the VLD bullets dont like being slung at higher speeds, contact Walt Berger and he can send you load data. Once your work out your most accurate loads, with whatever bullet, you can subtract probably around 20-30fps per inch you are chopping...

    My off the top of my head guess would you could prolly go down to 24" no problem and prolyl even squeek down to 22", but I think 20" would definately be pushing it with the MV you want in that heavy of a bullet...

    Is the SPS Varmint twist fast enough to stabilize a 162-168 grain bullet?
    -Jimmy

  3. #3
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    I have really been leaning toward the 162 a-max. I don't see how you can work up the load first though...barrel harmonics will change when you cut the barrel and that might not be best load anymore....right? I have read several articles where people have tested 308 and from 26" down to 20" there was little to no difference in velocity. I don't see why the 7mm-08 should be any different, but that is why I am asking. Rate of twist is 1 in 9 1/4 ....no problem there... 168 bergers are good to go with 1 in 10.

  4. #4
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    The 7mm-08, like the 308, generally performs well with a short barrel. But I think what he was getting at is to run the heavier pills in a 7-08, you'll want a bit more barrel to get a complete burn and push them to optimal velocity. If it were me, I'd build in the 22, 23, or 24 inch neighborhood if pushing the heavier high bc pills like the 162 A Max. If I were using something in the 130-150 range, then I'd probably go with a 19-22 inch barrel. But I'd continue your research before taking my word on it. :wink:

  5. #5
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    Someone on snipers hide has load data for his 7mm-08 claiming he is getting 2848 fps with the 162 and 46.8 grains H4350. I sent him a pm to see how long his barrel is. Seems awfully fast to me.

  6. #6
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    Take a look on Long Range Hunting as well. There's been a few conversations on there, one being me asking a similar question. Google "7mm-08 Barrel Length".

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