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Rifles, Reloading, Optics, Equipment
Reloading
Need Your 7 SAUM Load Data
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<blockquote data-quote="JamesBailey" data-source="post: 539437" data-attributes="member: 36230"><p>I'm Trebark's buddy, guy looking for any favorite load data on the 7SAUM. Thanks to the folks that have replied. I appreciate it and I'm putting all this stuff in my notes.</p><p> </p><p>On the 7WSM v 7SAUM issue. 7WSM appears faster by 50fps as it has a capacity advantage - however, there are a number of cartridge design issues with the 7WSM that reduce the actual speed advantage in the field.</p><p> </p><p>(1) if you are building the rifle on a short-action, 7SAUM is a slightly shorter case, which is important because with the long 7mm bullets, you need every thousandths of an inch. Especially if you plan to mag feed</p><p>(2) 7SAUM has a longer neck, which puts the base of the bullet much less deep into the case vs 7WSM. Note that a lot of guys are necking down the 300WSM to 7mm for the longer neck in the 300WSM; however, the 7SAUM neck is longer than 300WSM.</p><p>(3) 7SAUM has longer, less sharp shoulders than the 7WSM. In theory, this should produce a more precise cartridge, although I'm not sure this plays out in real world (probably not apparent unless we put the guns on cement blocks); however, the shoulder on the 7SAUM do make it easier to feed the cartridge into the chamber vs 7WSM.</p><p>(4) barrel life. No other way around it: more powder thru the same diameter = less barrel life, so 7SAUM has an advantage there. I'm thinking 1500-2000 rounds for 7SAUM and perhaps 10% less for 7WSM. Some folks say longer necks reduce barrel wear; don't know if that is a fact or fiction.</p><p>(5) 7SAUM has some pretty good brass available- Nosler and Norma - although the Remington stuff is not up to par. Not entirely sure on the 7WSM brass.</p><p> </p><p>There are a number of modified mags available to take the OAL length from 2.85-ish to 2.98-ish or even 3.10-ish and still mag feed on a short-action. 7SAUM appears to be the best cartridge for this route.</p><p> </p><p>Best of luck on your build. And thanks again on the above load data.</p></blockquote><p></p>
[QUOTE="JamesBailey, post: 539437, member: 36230"] I'm Trebark's buddy, guy looking for any favorite load data on the 7SAUM. Thanks to the folks that have replied. I appreciate it and I'm putting all this stuff in my notes. On the 7WSM v 7SAUM issue. 7WSM appears faster by 50fps as it has a capacity advantage - however, there are a number of cartridge design issues with the 7WSM that reduce the actual speed advantage in the field. (1) if you are building the rifle on a short-action, 7SAUM is a slightly shorter case, which is important because with the long 7mm bullets, you need every thousandths of an inch. Especially if you plan to mag feed (2) 7SAUM has a longer neck, which puts the base of the bullet much less deep into the case vs 7WSM. Note that a lot of guys are necking down the 300WSM to 7mm for the longer neck in the 300WSM; however, the 7SAUM neck is longer than 300WSM. (3) 7SAUM has longer, less sharp shoulders than the 7WSM. In theory, this should produce a more precise cartridge, although I'm not sure this plays out in real world (probably not apparent unless we put the guns on cement blocks); however, the shoulder on the 7SAUM do make it easier to feed the cartridge into the chamber vs 7WSM. (4) barrel life. No other way around it: more powder thru the same diameter = less barrel life, so 7SAUM has an advantage there. I'm thinking 1500-2000 rounds for 7SAUM and perhaps 10% less for 7WSM. Some folks say longer necks reduce barrel wear; don't know if that is a fact or fiction. (5) 7SAUM has some pretty good brass available- Nosler and Norma - although the Remington stuff is not up to par. Not entirely sure on the 7WSM brass. There are a number of modified mags available to take the OAL length from 2.85-ish to 2.98-ish or even 3.10-ish and still mag feed on a short-action. 7SAUM appears to be the best cartridge for this route. Best of luck on your build. And thanks again on the above load data. [/QUOTE]
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Need Your 7 SAUM Load Data
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