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Long Range Hunting & Shooting
Pressure question on 300 WSM
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<blockquote data-quote="Boisedoc" data-source="post: 2650556" data-attributes="member: 99050"><p>I have my new 300 WSM build with a SAAMI chamber. I went out to just do some pressure testing today. Ran 212 ELDX over 4831sc and a federal 215 primer. I loaded a dummy round with .002" neck tension and jammed it into the lands. Then backed off .020 from there and ran a ladder from 60-66 grains at 0.5 grain jumps. Saw a slight ejector mark at 61.5. Shot 62 and saw it a little better. Shot 62.5 and the bolt was a little heavy and I stopped. I have all the room in the world on my long action. Hornady has the round loaded at COAL of 2.92". Hogdon is running their data for 4831 sc at 2.860. I am running 2.986 COAL although I loaded it to CBTO while loading. Hogdon says max load is 66 at a little over 2700fps. At 62.5 I'm at 2560. Should I back the bullet in to 2.92 or 2.86 and try again to work up? Maybe .020 is causing pressure too early? Or try h4350 as Hornady has in their manual or H1000? </p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="Boisedoc, post: 2650556, member: 99050"] I have my new 300 WSM build with a SAAMI chamber. I went out to just do some pressure testing today. Ran 212 ELDX over 4831sc and a federal 215 primer. I loaded a dummy round with .002” neck tension and jammed it into the lands. Then backed off .020 from there and ran a ladder from 60-66 grains at 0.5 grain jumps. Saw a slight ejector mark at 61.5. Shot 62 and saw it a little better. Shot 62.5 and the bolt was a little heavy and I stopped. I have all the room in the world on my long action. Hornady has the round loaded at COAL of 2.92”. Hogdon is running their data for 4831 sc at 2.860. I am running 2.986 COAL although I loaded it to CBTO while loading. Hogdon says max load is 66 at a little over 2700fps. At 62.5 I’m at 2560. Should I back the bullet in to 2.92 or 2.86 and try again to work up? Maybe .020 is causing pressure too early? Or try h4350 as Hornady has in their manual or H1000? Thanks [/QUOTE]
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Pressure question on 300 WSM
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