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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7-300 Norma Mag Improved. IT’S ALIVE!!
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<blockquote data-quote="Huntnful" data-source="post: 3044458" data-attributes="member: 116563"><p>Still obviously learning this cartridge and what charge weight for what bullet weights. So this evenings test wasn't ideal.</p><p></p><p>I was over pressure on the 190 LRHT's and H1000 in my once fired brass. Which I honestly thought I had enough cushion not to be. I was wrong. </p><p></p><p>85gr. yielded a bolt click and 3200fps right of the bat</p><p></p><p>I had 5 loaded at 86gr. for the little accuracy test. I still decided to shoot all 5 because that's what I was there for and it didn't feel that dangerous. Shot just under a 1 MOA 5 shot group at 400 yards. Decent bolt lift for sure, so not ideal conditions for accuracy being that far into pressure. But I did find out that H1000 is really consistent, even in this under filled case, and into pressure.</p><p></p><p>This is 5 shots at 86gr. H1000 and 190 LRHT's</p><p>[ATTACH=full]547714[/ATTACH]</p><p></p><p>I believe I would have to drop down to 84gr. or possibly even 83gr. to get out of pressure with the 190's. So realistic velocity probably around 3100-3140fps with H1000. </p><p></p><p></p><p>Then I shot the 160 Copper Rose with Retumbo. They shot just over 1 MOA at 400 yards for 5 shots. Also not ideal, since they were loaded in my old 300 NMI that I just necked down for testing purposes. </p><p></p><p>87gr. 3436fps</p><p>88gr. 3460fps</p><p>89gr. 3470fps bolt click</p><p>90gr. 3523fps heavy bolt lift</p><p></p><p>5 shots at 87gr. Retumbo</p><p>[ATTACH=full]547722[/ATTACH]</p><p></p><p></p><p>Basically we're all just learning this cartridge together lol. Everything is new to me also. So I'm just trying to test and document data for future possible interests in the cartridge.</p></blockquote><p></p>
[QUOTE="Huntnful, post: 3044458, member: 116563"] Still obviously learning this cartridge and what charge weight for what bullet weights. So this evenings test wasn't ideal. I was over pressure on the 190 LRHT's and H1000 in my once fired brass. Which I honestly thought I had enough cushion not to be. I was wrong. 85gr. yielded a bolt click and 3200fps right of the bat I had 5 loaded at 86gr. for the little accuracy test. I still decided to shoot all 5 because that's what I was there for and it didn't feel that dangerous. Shot just under a 1 MOA 5 shot group at 400 yards. Decent bolt lift for sure, so not ideal conditions for accuracy being that far into pressure. But I did find out that H1000 is really consistent, even in this under filled case, and into pressure. This is 5 shots at 86gr. H1000 and 190 LRHT's [ATTACH type="full"]547714[/ATTACH] I believe I would have to drop down to 84gr. or possibly even 83gr. to get out of pressure with the 190's. So realistic velocity probably around 3100-3140fps with H1000. Then I shot the 160 Copper Rose with Retumbo. They shot just over 1 MOA at 400 yards for 5 shots. Also not ideal, since they were loaded in my old 300 NMI that I just necked down for testing purposes. 87gr. 3436fps 88gr. 3460fps 89gr. 3470fps bolt click 90gr. 3523fps heavy bolt lift 5 shots at 87gr. Retumbo [ATTACH type="full"]547722[/ATTACH] Basically we're all just learning this cartridge together lol. Everything is new to me also. So I'm just trying to test and document data for future possible interests in the cartridge. [/QUOTE]
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7-300 Norma Mag Improved. IT’S ALIVE!!
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