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The Range
Ammo & Reloading
165gr hard cast 30-30
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<blockquote data-quote="swampratt" data-source="post: 2731645" data-attributes="member: 15054"><p>I have found for non gas checked bullets you can start low and work up until the bullet tumbles when it tumbles a couple things are happening.</p><p>The bullet is skidding through the bore instead of spinning from the groove rotation.</p><p></p><p>This will allow lead to build up and the bullet will no longer have rifle grooves in it when you recover it.. it will look like you took 36 grit sand paper and sanded it.</p><p></p><p>Depending on twist rate and groove profile along with proper hardness and size you will be surprised how fast you can send a lead bullet.</p><p>And the hardest lead is not the answer.</p><p></p><p>The gas check keeps the bullet spinning in the grooves and allows more speed before it skids and tumbles.</p><p></p><p>I use a gas checked lee 170gr and varget which is a great powder for those and my velocity is mid 1800 to mid 1900fps and accuracy at 100 yards is on par with 150gr plated bullets.</p><p></p><p>But like was stated by Cedar Creek you may could push the non gas checked bullet too fast.. but only way to know is to shoot some paper and recover the bullet</p><p> for inspection.</p><p></p><p>I had some fliers when shooting cast from my 30-30 and discovered that it was neck thickness issues.. some necks were .013" thick and some of the brass was .010" thick.</p><p>I turned all necks to .010" thick and eliminated my fliers.</p><p></p><p>My groups would look good and tight then one would be 4" away or more.</p><p>This was with rifle powders.</p><p>Funny thing was with 2400 powder the groups were 2x as large as the rifle powders but no fliers.</p><p></p><p>Maybe they were all fliers in the same area....</p><p>I have been needing to shoot my 30-30 more.</p></blockquote><p></p>
[QUOTE="swampratt, post: 2731645, member: 15054"] I have found for non gas checked bullets you can start low and work up until the bullet tumbles when it tumbles a couple things are happening. The bullet is skidding through the bore instead of spinning from the groove rotation. This will allow lead to build up and the bullet will no longer have rifle grooves in it when you recover it.. it will look like you took 36 grit sand paper and sanded it. Depending on twist rate and groove profile along with proper hardness and size you will be surprised how fast you can send a lead bullet. And the hardest lead is not the answer. The gas check keeps the bullet spinning in the grooves and allows more speed before it skids and tumbles. I use a gas checked lee 170gr and varget which is a great powder for those and my velocity is mid 1800 to mid 1900fps and accuracy at 100 yards is on par with 150gr plated bullets. But like was stated by Cedar Creek you may could push the non gas checked bullet too fast.. but only way to know is to shoot some paper and recover the bullet for inspection. I had some fliers when shooting cast from my 30-30 and discovered that it was neck thickness issues.. some necks were .013" thick and some of the brass was .010" thick. I turned all necks to .010" thick and eliminated my fliers. My groups would look good and tight then one would be 4" away or more. This was with rifle powders. Funny thing was with 2400 powder the groups were 2x as large as the rifle powders but no fliers. Maybe they were all fliers in the same area.... I have been needing to shoot my 30-30 more. [/QUOTE]
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