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Lyman Manual 47th Edition

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Old April 11th, 2013, 01:43 PM   #1
 
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Lyman Manual 47th Edition

Had my Ruger American Rifle in a local gun shop for checking the headspace. While talking with the gunsmith he recommended getting a copy of the Lyman manual 47th. edition. He claims that edition is his bible for reloading and that most bullet & powder manufacturers understate max. loads by about 25%. Any comments or thoughts? Is it worth searching for?



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Old April 11th, 2013, 02:02 PM   #2
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All I can say is that I have and still use the 46th for loads where I know a powder hasn't been altered in any form. For newer handgun propellants I use the much newer Pistol & Revolver III. For rifle powders that have been introduced since the 46th, I go straight to the manufacturer's website for data.
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Old April 11th, 2013, 03:35 PM   #3
 
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Quote:
Originally Posted by TxAg71 View Post
Had my Ruger American Rifle in a local gun shop for checking the headspace. While talking with the gunsmith he recommended getting a copy of the Lyman manual 47th. edition. He claims that edition is his bible for reloading and that most bullet & powder manufacturers understate max. loads by about 25%. Any comments or thoughts? Is it worth searching for?
Are you sure his said the 47th edition; I believe the current one, is the 49th???
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Old April 12th, 2013, 07:24 AM   #4
 
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He said 47th. He considers it be superior to the new 49th. I had a Lyman manual 25 - 30 years ago that was already old when I got it. It seemed like a good starter manual. But when a gunsmith swears by specific manual as being his bible on reloading, figured it is worth checking out.
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Old April 12th, 2013, 12:03 PM   #5
 
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I just picked up #49 and it seems thorough . I like the refresher. My Speer #11 was a little dated and since my vacation from reloading was about a decade I figured a refresher was in order. Glad to hear the gunsmith really likes it. Other than load info the basic principles Im sure are the same.
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Old April 12th, 2013, 12:31 PM   #6
 
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I have a 47th as well as several hornady/Speer/Berger/Lee etc books.
I don't take any of them as biblical truth when it comes to maximum loads- some have some cartidges loaded hotter than others while have other cartridges loaded lighter (except LEE, which is across the board conservative loads).
Each firearm is different and is definately different than the one used for pressure testing in the manuals. Variations in chamber dimensions, leade lengths, seating depth, primers, etc can make considerable difference between what's safe on the low or high side than what a book lists.
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Old April 13th, 2013, 10:08 AM   #7
 
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Quote:
Originally Posted by TxAg71 View Post
Had my Ruger American Rifle in a local gun shop for checking the headspace. While talking with the gunsmith he recommended getting a copy of the Lyman manual 47th. edition. He claims that edition is his bible for reloading and that most bullet & powder manufacturers understate max. loads by about 25%. Any comments or thoughts? Is it worth searching for?
The Lyman 47th edition was published in 1997 - sixteen years ago. I'm always a bit suspicious of people - even gunsmiths - who claim that manufacturers understate the load for legal or other reasons.

A lot of the reason loads have changed in the past 20 years is the introduction of piezoelectric pressure gauges in place of the old copper crusher. The piezoelectric gauges capture pressure transients that the copper crusher doesn't show.

One of the problems I've had with old loading manuals is that they don't cover the newer bullets. This is especially true for the newer monometal bullets (like Barnes), but it even holds true for some of the "traditional" jacketed lead bullets, since the manufacturers change their construction from time to time.

I keep my old manuals for loading my old stock bullets, but I also have a set of new manuals that I use for most of my reloading.

I don't think there's any serious problem using the Lyman 47th edition, but I don't see any reason to go looking for one.


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Old April 13th, 2013, 10:23 AM   #8
 
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I think I will get the 49th Edition to add as another reference book. My brief search for the 47th Edition only turned up a few and were priced greater than what I would consider a good price for a used book.
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Old April 13th, 2013, 07:03 PM   #9
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Originally Posted by TxAg71 View Post
I think I will get the 49th Edition to add as another reference book. My brief search for the 47th Edition only turned up a few and were priced greater than what I would consider a good price for a used book.
I have compared the data from my 46th to the 49th and find little or no change in the data. You are probably just as well served by the 49th.

As far as SAAMI's PSI rating, that's done by piezoelectric transducer which is not a "gauge" but rather an electronic component wired to an Oscilloscope or ballistic computer system.

Last edited by K57; April 13th, 2013 at 07:06 PM.
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