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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Efficiency out of 22" barrel
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<blockquote data-quote="AZShooter" data-source="post: 837411" data-attributes="member: 5219"><p>The 284 will allow you to seat those long 180s without impinging on case and still fit the magazine box.</p><p></p><p> If you decide to use the 284 be certain you won't have any feeding issues. </p><p>Lapua makes some fantastic 6.5-284 brass that can easily be necked up to 7mm. I am not fond of Norma 6.5-284. 284 win is strong but not very precise, would definitely want to neck turn them. </p><p></p><p>You KNOW the 280 won't have feeding issues but the sharper shouldered AI might. Again check before you make your move. </p><p></p><p>If you were to go with a 1 in 8.5 twist you would be able to shoot the upcoming 195 berger. This twist rate wouldn't cause any issues with a 168 berger. </p><p></p><p></p><p>IMO reamer specifications can make a big difference. </p><p></p><p>As for throating: I would make a dummy round to be sent to the reamer maker of your choice with specifications that you would like the bullet to be able to engage the rifling or how much freebore you would like.</p><p></p><p> The throat angle is another consideration. I use Pacific Tool and Gauge reamers. Dave Kiff and I talk this stuff through. Usually he recommends a 1 degree 30 min throat angle unless he has data to suggest otherwise. That angle has done well with several of my rifles shooting the finicky VLDs. </p><p></p><p>You might want to tighten up the neck dimension to a specification or even neck turn. You can discuss that with your reamer maker as well. I would consider a no turn neck if Lapua brass was to be used. Not sure about Nosler, never loaded for any. </p><p></p><p>I hope this thread has helped you. </p><p></p><p> Be sure to share with us the details of what you end up doing and how it performs so we can learn from you.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 837411, member: 5219"] The 284 will allow you to seat those long 180s without impinging on case and still fit the magazine box. If you decide to use the 284 be certain you won't have any feeding issues. Lapua makes some fantastic 6.5-284 brass that can easily be necked up to 7mm. I am not fond of Norma 6.5-284. 284 win is strong but not very precise, would definitely want to neck turn them. You KNOW the 280 won't have feeding issues but the sharper shouldered AI might. Again check before you make your move. If you were to go with a 1 in 8.5 twist you would be able to shoot the upcoming 195 berger. This twist rate wouldn't cause any issues with a 168 berger. IMO reamer specifications can make a big difference. As for throating: I would make a dummy round to be sent to the reamer maker of your choice with specifications that you would like the bullet to be able to engage the rifling or how much freebore you would like. The throat angle is another consideration. I use Pacific Tool and Gauge reamers. Dave Kiff and I talk this stuff through. Usually he recommends a 1 degree 30 min throat angle unless he has data to suggest otherwise. That angle has done well with several of my rifles shooting the finicky VLDs. You might want to tighten up the neck dimension to a specification or even neck turn. You can discuss that with your reamer maker as well. I would consider a no turn neck if Lapua brass was to be used. Not sure about Nosler, never loaded for any. I hope this thread has helped you. Be sure to share with us the details of what you end up doing and how it performs so we can learn from you. [/QUOTE]
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Efficiency out of 22" barrel
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