.308 Win., 155 gr Lapua Scenar, VV N540, R8 match barrel

[Saugmann]

Cartridge: .308 Winchester
Bullet make/model: Lapua Scenar
Bullet weight: 155 grains
Brass: Lapua
Powder make/model: Vihtavuori N540
Powder weight: 44.3 grain
Primer make/model: CCI BR2
COL: 2.795"
Rifle/barrel: Blaser R8 match with sound moderator
Scope: Kahles K624i
MV: 796 meters per second
Accuracy at 100 yards: 1" or so, but I will repeat to confirm consistency



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[SPEEDY]

That's a pretty slow speed isn't it, shouldn't you be able to get over 880mps?

[Saugmann]

I agree Speedy, it's not exactly a powerful load .

I will add that I don't expect to get a heck of a lot of velocity from the Blaser match barrel.

It's 23.6" long and probably only 23" when you account for the locking section.

When I shot F-class I got an MV of around 914 mps/ 3000 fps with 155 gr bullets. And that was out of a 32" barrel.

So I don't think I can quite reach 880 mps in this barrel.

I'm not too concerned about the velocity though. I primarily use it for a discipline called McQueens at 300 yards and the practical difference in higher MV is limited.

I'll probably spend some more time trying to get group to tighten up a bit.


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[icebug]

Frankly, I would also expect a better group than 1" at 100yds from that barrel.
I know mine shoots better.

[Saugmann]

So would I. The group I shot at 100 yards was an inch, but it was a little hurried.

What velocity are you getting from your .308 match barrel? And with what bullet/weight?


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[SPEEDY]

What velocity are you getting from your .308 match barrel? And with what bullet/weight?

I shoot the 168gn Amax in front of 43gn of AR8208 for 2800fps, which is 100fps more then the ADI manual lists.
But it lines up with my ballistics program and real world testing to confirm it.

So that's 853m/s with a 168gn pills out of a 22" barrel.
Well to be accurate it's an ES of 2785-2798fps.

[icebug]

So would I. The group I shot at 100 yards was an inch, but it was a little hurried.

What velocity are you getting from your .308 match barrel? And with what bullet/weight?

Approx 810 m/s, Berger Match Classic Hunter 185grs

[Saugmann]

Thanks guys. That's more than I expected to get. I will reconsider developing for velocity.


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[SPEEDY]

Thanks guys. That's more than I expected to get. I will reconsider developing for velocity.

Velocity isn't everything but there's no need to drop it back too much if your not going too hot.
A mild load around 2800fps from a 155gn pill will be better at range and actually safer.
I'm more worried about under loading then by going a little bit over.

[Saugmann]

I agree, but with what you guys are getting I should be able to wring a little more out of it.


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[vodekz]

You should be in 2850 FPS with this bullet in R-8 23 inch barrel. Try N140 from VV. My R-8 with 150 gr Partition shoots 2900 FPS, no pressure signs.