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#3168137 - 02/18/13 04:45 AM Different specs between manuals ?
MUP
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Registered: 08/01/07
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I've reloaded some .223 from the specs of the Speer manual, and the OAL is stated as 2.215 as tested. I looked in the Lyman manual and they call out 2.260 OAL...what the heck am I missing? That's a BIG difference! 55gr btw
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MUP

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#3168177 - 02/18/13 05:56 AM Re: Different specs between manuals ? [Re: MUP]
Model70Man
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Registered: 09/30/05
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Loc: Knoxville, TN

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Many times you will see .223 AR and .223 Bolt action. That could be the difference in length.
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#3168204 - 02/18/13 06:52 AM Re: Different specs between manuals ? [Re: Model70Man]
KPH
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Registered: 08/06/05
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It will also depend on what bullet is used being different shapes. There may be some other factors
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#3168236 - 02/18/13 07:27 AM Re: Different specs between manuals ? [Re: KPH]
EastTNHunter
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Registered: 03/08/10
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 Originally Posted By: KPH
It will also depend on what bullet is used being different shapes. There may be some other factors


What he said. A different ogive will cause the bullet to contact the lands at different lengths, even within the same weights. But remember, the COAL in manuals is really only a "suggestion" based on a SAAMI spec chamber.

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#3168260 - 02/18/13 07:46 AM Re: Different specs between manuals ? [Re: EastTNHunter]
rdl65
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Registered: 03/08/08
Posts: 2471
Loc: Washington County

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The manuals are all printed on the safe side. OAL is suggested at a certain length because it is the safest, and feeds the best for all rifles. If a cartridge will feed reliably and give good accuracy that is the OAL you need to load at.
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#3168290 - 02/18/13 08:12 AM Re: Different specs between manuals ? [Re: rdl65]
MUP
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Thanks guys. I checked the OAL on the factory ammo I have and it matched the Speer specs, so that's what I went with originally.
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MUP

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#3168472 - 02/18/13 10:49 AM Re: Different specs between manuals ? [Re: MUP]
MUP
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Just wondering, what is the optimal distance to strive for between bullet and land anyway? Is it just different for different loads and barrels?
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#3169138 - 02/18/13 08:27 PM Re: Different specs between manuals ? [Re: MUP]
Jcalder
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Registered: 09/18/12
Posts: 980
Loc: Tennesse

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Every bullet is different. I think Berger bullets prefer to be crammed into he lands. Personally I prefer just off the lands. And what works in one gun may not work in another
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#3169446 - 02/19/13 07:43 AM Re: Different specs between manuals ? [Re: Jcalder]
MUP
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Registered: 08/01/07
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Loc: Just North of Chatt-town

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How do you adjust for each particular barrel land distance? Just drop the loaded bullet into the chamber and measure till it seats or what?
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MUP

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Professionals: Built the Titanic

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#3169458 - 02/19/13 07:54 AM Re: Different specs between manuals ? [Re: MUP]
rdl65
8 Point


Registered: 03/08/08
Posts: 2471
Loc: Washington County

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Read this link, it will help you in finding your seating depth.

http://blog.sinclairintl.com/2009/03/26/determining-bullet-seating-depth/
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