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Reloading Techniques For Reloading


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Reloading Manuals ??

 
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  #1  
Old 01-29-2013, 08:08 PM
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Reloading Manuals ??

Why are the maximum loads so different for the same weight bullet from company to company? Does a 165 gr 30 cal hornady build more or less pressure than say a 165 gr nosler under the same load? Just curious.
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  #2  
Old 01-29-2013, 08:24 PM
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Re: Reloading Manuals ??

More than likely, yes. As a rule of thumb, always back off the powder charge when using different components. CCI, federal, Remington, Winchester, etc all make LR primers but they burn at different temps. Brass varies by thickness, hardness. Bullets vary by design, jacket thickness etc. Any of these will cause a difference in pressure.
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Old 01-29-2013, 08:29 PM
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Re: Reloading Manuals ??

There's far less pressure variations between most bullets than there is between the rifles used in their tests to develop the listed data. If they all used the same rig for their tests the results would be much closer together.
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Old 01-30-2013, 12:10 AM
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Re: Reloading Manuals ??

Quote:
Originally Posted by boomtube View Post
There's far less pressure variations between most bullets than there is between the rifles used in their tests to develop the listed data. If they all used the same rig for their tests the results would be much closer together.
+1 for that.

But if we knew exactly how our rigs were going to react with whichever powder, primer and bullet combo that we choose, it wouldnt be as fun and as rewarding as it is when we achieve those tiny groups from our test loads.
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  #5  
Old 01-30-2013, 06:13 AM
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Re: Reloading Manuals ??

Thanks for the info. Makes sense to me.
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  #6  
Old 01-30-2013, 06:25 AM
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Re: Reloading Manuals ??

Quote:
Originally Posted by metalhead View Post
More than likely, yes. As a rule of thumb, always back off the powder charge when using different components. CCI, federal, Remington, Winchester, etc all make LR primers but they burn at different temps. Brass varies by thickness, hardness. Bullets vary by design, jacket thickness etc. Any of these will cause a difference in pressure.

+1
Very well said.

Different reloading manuals vary in there data also. Some are very conservative and some are not.

Even with the exact same componants, different rifles will vary in pressure and velocity so it is
always wise to start low and work up.

Note: Manuals from the same source but different published dates will vary due to changes in
powder and philosophy also.

J E CUSTOM
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  #7  
Old 01-30-2013, 07:34 AM
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Re: Reloading Manuals ??

There is a good bit of variation between some of the bullet designs as far as pressure generated for a given powder charge. I've seen in my 7stw(and occasionally elsewhere) where a MILD charge for one bullet will nearly be excessive pressure with another. Nosler acubond 140's in my 7stw will take about 4 grains less rl22 than the sierra 140 for the same basic pressure.

I usually try to find a manual that will "track" with the rifle I'm loading for as far as safe loads. My 300 rum tracks closely to the Nosler data. My 25 wssm tracks well with Hodgdon. Some rifles are just mutts and they'll not really track well with any book. This doesn't mean I jump to top load after I figure this out( I still run the charges); it just lessens the pucker factor a bit on some of the calibers with a lot of charge variation between manuals.
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