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#7175105 - 12/12/12 01:48 PM Re: Load Manual Velocities [Re: snuzem]
SAUMHUNTER79 Offline
Campfire Ranger

Registered: 04/06/10
Posts: 1691
Loc: WI
That's pretty normal, also, don't sweat velocity too much, velocity and trajectory aren't the same thing, a lot of times one has to add a significant amount of powder to gain much trajectory over a "slower" load.

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#7175312 - 12/12/12 02:41 PM Re: Load Manual Velocities [Re: SAUMHUNTER79]
RockyRaab Offline
Campfire 'Bwana

Registered: 05/23/03
Posts: 13358
Loc: Ogden, Utah
First, the manual IS correct. What they print is exactly what they got.

Second, the major difference between what they got and what you can get is what they shot it in. If they used an instrumented test barrel (to get pressure readings as well as velocity) then that barrel was cut to absolute minimum dimensions. Because it is tighter in all respects, it delivered higher pressures AND higher velocities than a looser sporting barrel will. That's for obvious safety reasons.

So a chronograph reading from your rifle and using your components that registers 100 fps or so less than the "book" number is probably dead smack on.
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#7175317 - 12/12/12 02:44 PM Re: Load Manual Velocities [Re: baldhunter]
dingo Offline
Campfire Regular

Registered: 09/15/09
Posts: 404
Loc: Qld Australia
Originally Posted By: baldhunter
I've always felt Nosler velocities ran a little high for the amount of powder called for in their loads.I trust my chronograph and don't worry too much what the book says.It's only a guide,every rifle is different and powders can vary from lot to lot too.


When using 50gn bullets and Varget in my Rem 700VLS 22/250 I get velocity around 200fps less than the Nosler manuel despite my rifle having a barrel 2" longer than the test barrel.

Some of the velocities in the Nosler manual are "out of this world" in terms of achievability.

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#7175660 - 12/12/12 04:18 PM Re: Load Manual Velocities [Re: dingo]
8nbait Offline
Campfire Regular

Registered: 12/09/11
Posts: 317
Loc: Back in Idaho, soon
My 6.5 is right on book velocities but my 25-06 is much faster than book velocities. I just trust the chrono. I assume this is normal.

gary

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#7175700 - 12/12/12 04:27 PM Re: Load Manual Velocities [Re: 1OntarioJim]
boomtube Offline
Campfire Regular

Registered: 02/27/08
Posts: 1491
If we loaded the book maker's components in the book maker's fire arms I bet we'd get the book's speeds. Alas, mine are different. wink

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#7176381 - 12/12/12 06:52 PM Re: Load Manual Velocities [Re: boomtube]
snuzem Offline
Member

Registered: 06/27/10
Posts: 146
Loc: MS Gulf Coast
Thanks for all the replies. It makes me feel a lot better knowing its not something I'm doing wrong( this time, anyway).
Thanks again
Scott

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#7176878 - 12/12/12 08:47 PM Re: Load Manual Velocities [Re: snuzem]
bobnob17 Offline
Campfire Regular

Registered: 05/01/12
Posts: 777
Loc: NSW Australia
I load Hodgdon/ADI powders usually from the Hodgdon/ADI data. Most of my results are pretty close to the book with the exception of my old 308 which has a barrel that's shot over 10 000 rounds. It gives me about 200fps less than what the books say I should. Probably not surprising. Still groups well though.

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