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Rifles, Reloading, Optics, Equipment
Reloading
7 SAUM Seating Heavies Long
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<blockquote data-quote="Rijoh" data-source="post: 2566606" data-attributes="member: 109385"><p>Newbie question - how much benefit/velocity do you get from loading heavies long to get more case capacity? I have a 7 SAUM (Tikka/Proof) and have hand loaded a range of bullet weights like the 145 LRX, 168 & 175 ABLR to SAAMI specs with good results. Also tired the Berger 195. Berger recommended a COAL of 2.935 using RL26.</p><p></p><p>Was reading the seating depth article on Berger's site <a href="https://bergerbullets.com/shoot-better/shooting-knowledge/measuring-coal-and-cbto/" target="_blank">https://bergerbullets.com/shoot-better/shooting-knowledge/measuring-coal-and-cbto/</a> and this line got me thinking. <em><strong>the extra powder you can add to a cartridge with the bullet seated long will allow you to achieve <u>greater velocity at the same pressure</u> than a cartridge with a bullet seated short.</strong></em></p><p></p><p>Using Gordon's Reloading tool I plugged in the numbers to see how many max grains gets me to SAAMI or CIP pressure limit. When I adjust the seating depth to a larger coal it drops the pressure curve and case fill automatically. Adding more grains of powders brings me back to the same pressure limit. But velocity stays within a few fps as the previous and no increase. It was roughly 1 grain more depending where I input the coal.</p><p></p><p>So is this just an issue with GRT vs real world? I know I'm missing something in this equation and just can't seem to wrap my head around what it is. I'm wanting to understand this before trying and then will work up slowly.</p></blockquote><p></p>
[QUOTE="Rijoh, post: 2566606, member: 109385"] Newbie question - how much benefit/velocity do you get from loading heavies long to get more case capacity? I have a 7 SAUM (Tikka/Proof) and have hand loaded a range of bullet weights like the 145 LRX, 168 & 175 ABLR to SAAMI specs with good results. Also tired the Berger 195. Berger recommended a COAL of 2.935 using RL26. Was reading the seating depth article on Berger's site [URL]https://bergerbullets.com/shoot-better/shooting-knowledge/measuring-coal-and-cbto/[/URL] and this line got me thinking. [I][B]the extra powder you can add to a cartridge with the bullet seated long will allow you to achieve [U]greater velocity at the same pressure[/U] than a cartridge with a bullet seated short.[/B][/I] Using Gordon's Reloading tool I plugged in the numbers to see how many max grains gets me to SAAMI or CIP pressure limit. When I adjust the seating depth to a larger coal it drops the pressure curve and case fill automatically. Adding more grains of powders brings me back to the same pressure limit. But velocity stays within a few fps as the previous and no increase. It was roughly 1 grain more depending where I input the coal. So is this just an issue with GRT vs real world? I know I'm missing something in this equation and just can't seem to wrap my head around what it is. I'm wanting to understand this before trying and then will work up slowly. [/QUOTE]
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7 SAUM Seating Heavies Long
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