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This & That....A Layman's Long Range Rifle?
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<blockquote data-quote="Jon A" data-source="post: 1324" data-attributes="member: 319"><p><strong>Re: This & That....A Layman\'s Long Range Rifle?</strong></p><p></p><p>Darryl's right Tom H, you need a new ballistics program... <img src="http://images/icons/wink.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> With a 180 MK at sea level, he'd need to sight in 7.34" high at 100 to be on at 500.</p><p></p><p>While those velocities are high, they are definately not unbelievable. Fast barrel, good brass? I too have gotten 3300 fps from the 300 Win in my 26" A-bolt with one particular 180. But I did have some nice ejector marks...one of those "load them in the winter, shoot them in the summer"-type deals. The funny thing is that those three rounds that averaged 3300 over the chronograph went into the smallest group my rifle ever fired. Well, hell, I'll post it:</p><p></p><p></p><p> <img src="http://home.earthlink.net/~jonaa/180.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p></p><p>I guess some rifles like it hot?</p><p></p><p>Anyway, I've found bullet design makes a big difference. I could push these way over 3200 with no pressure signs. With a Barnes XBT I could not get 3200 without excessive pressure. With X flat bases, I could barely get over 3100, max.</p><p></p><p>If 3300 is max RUM velocity for a 180 then I need to call my gunsmith and tell him to stop! 50% increase in recoil for 100 fps is NOT worth it. You can buy factory ammo for the 300 Weatherby rated for 3300 fps--from a case with 13 grains or so less capacity.</p><p></p><p>BTW, my A-Bolt had a fairly long throat and I modified my magazine to let me seat the bullets way out there. That alone probably gained 5 grains or so powder capacity depending upon bullet weight.</p></blockquote><p></p>
[QUOTE="Jon A, post: 1324, member: 319"] [b]Re: This & That....A Layman\'s Long Range Rifle?[/b] Darryl's right Tom H, you need a new ballistics program... [img]images/icons/wink.gif[/img] With a 180 MK at sea level, he'd need to sight in 7.34" high at 100 to be on at 500. While those velocities are high, they are definately not unbelievable. Fast barrel, good brass? I too have gotten 3300 fps from the 300 Win in my 26" A-bolt with one particular 180. But I did have some nice ejector marks...one of those "load them in the winter, shoot them in the summer"-type deals. The funny thing is that those three rounds that averaged 3300 over the chronograph went into the smallest group my rifle ever fired. Well, hell, I'll post it: [img]http://home.earthlink.net/~jonaa/180.jpg[/img] I guess some rifles like it hot? Anyway, I've found bullet design makes a big difference. I could push these way over 3200 with no pressure signs. With a Barnes XBT I could not get 3200 without excessive pressure. With X flat bases, I could barely get over 3100, max. If 3300 is max RUM velocity for a 180 then I need to call my gunsmith and tell him to stop! 50% increase in recoil for 100 fps is NOT worth it. You can buy factory ammo for the 300 Weatherby rated for 3300 fps--from a case with 13 grains or so less capacity. BTW, my A-Bolt had a fairly long throat and I modified my magazine to let me seat the bullets way out there. That alone probably gained 5 grains or so powder capacity depending upon bullet weight. [/QUOTE]
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