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Rifles, Reloading, Optics, Equipment
Reloading
Brass weight to load weight correlation?
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<blockquote data-quote="moosekiller99" data-source="post: 1804102" data-attributes="member: 46100"><p>I have exclusively used Winchester brass in my Ruger M 77 that I weight sorted years ago. As I am running out of usable pieces I decided to begin load development with the Remington brass that was also sorted but never used in this rifle. The Rem brass is heavier than the Win brass by 8-15 grains in some pieces which means lighter charges to obtain similar velocity and pressure. Using some math I calculated that the 61.0 load I use in the 187 gr Win brass should be reduced to 58.0 grains in the 197 gr Rem brass. I of course will work up to this load weight and chrono each incremental load as I approach my math predicted load. I know there are numerous variables that I am ignoring in this process, but I am hoping my end result shows a close correlation between the two variables (brass and charge weight). The current components are: 3000 fps using Win brass; Win Primer; 150 grain Nosler Partition and 61.0 grains of Reloder 26. Same load with Berger 150 grain VLD's is 3010 - 3020 fps with nearly same POI at 100 yds. </p><p>So, any thoughts whether my methodology is sound?</p></blockquote><p></p>
[QUOTE="moosekiller99, post: 1804102, member: 46100"] I have exclusively used Winchester brass in my Ruger M 77 that I weight sorted years ago. As I am running out of usable pieces I decided to begin load development with the Remington brass that was also sorted but never used in this rifle. The Rem brass is heavier than the Win brass by 8-15 grains in some pieces which means lighter charges to obtain similar velocity and pressure. Using some math I calculated that the 61.0 load I use in the 187 gr Win brass should be reduced to 58.0 grains in the 197 gr Rem brass. I of course will work up to this load weight and chrono each incremental load as I approach my math predicted load. I know there are numerous variables that I am ignoring in this process, but I am hoping my end result shows a close correlation between the two variables (brass and charge weight). The current components are: 3000 fps using Win brass; Win Primer; 150 grain Nosler Partition and 61.0 grains of Reloder 26. Same load with Berger 150 grain VLD’s is 3010 - 3020 fps with nearly same POI at 100 yds. So, any thoughts whether my methodology is sound? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Brass weight to load weight correlation?
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