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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 RUM, 200 AccuBond + Retumbo Results:
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<blockquote data-quote="Jon A" data-source="post: 28276" data-attributes="member: 319"><p>Thanks, guys.</p><p></p><p>I should have known you'd say that, Darryl. <img src="http://images/icons/wink.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Now that you did I'm a bit PO'd at myself. While I didn't include any Matchkings in this test, I have tested the 240 before in the same medium and I really should have included some pics. I'll try to take some (without a digital camera that means I'll have to wait until the whole roll is shot up before they can be developed). One word of warning, while they performed very well as far as the wound channel goes, what was left of the bullets isn't much to look at. But my box of 240's was on standby if these failed to shoot--I came very close after the poor results with H870.</p><p></p><p>Jerry, yeah the temps were in the 95 degree range during all this testing. I'm sure that didn't help. But that's another vote for Retumbo that it did so well in the heat.</p><p></p><p>I do think most of the plastic tipped bullets have underrated BC's (including Nosler's Ballistic tips) but as far as I can tell this bullet is spot on or very close to .588. It matched my charts out to 700 very well correcting for weather/altitude as well as I could. Trajectory at only 700 isn't a very accurate way to measure BC's but that's all I've got.</p><p></p><p>Remember the length of the bullet has little to do with BC's--but weight has a great deal to do with it. If you beleive their advertised numbers, the AB has a more aerodynamic, efficient shape than the 220 SMK. But the SMK has a 20 grain weight advantage which makes it harder to slow down for the same drag force.</p></blockquote><p></p>
[QUOTE="Jon A, post: 28276, member: 319"] Thanks, guys. I should have known you'd say that, Darryl. [img]images/icons/wink.gif[/img] Now that you did I'm a bit PO'd at myself. While I didn't include any Matchkings in this test, I have tested the 240 before in the same medium and I really should have included some pics. I'll try to take some (without a digital camera that means I'll have to wait until the whole roll is shot up before they can be developed). One word of warning, while they performed very well as far as the wound channel goes, what was left of the bullets isn't much to look at. But my box of 240's was on standby if these failed to shoot--I came very close after the poor results with H870. Jerry, yeah the temps were in the 95 degree range during all this testing. I'm sure that didn't help. But that's another vote for Retumbo that it did so well in the heat. I do think most of the plastic tipped bullets have underrated BC's (including Nosler's Ballistic tips) but as far as I can tell this bullet is spot on or very close to .588. It matched my charts out to 700 very well correcting for weather/altitude as well as I could. Trajectory at only 700 isn't a very accurate way to measure BC's but that's all I've got. Remember the length of the bullet has little to do with BC's--but weight has a great deal to do with it. If you beleive their advertised numbers, the AB has a more aerodynamic, efficient shape than the 220 SMK. But the SMK has a 20 grain weight advantage which makes it harder to slow down for the same drag force. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 RUM, 200 AccuBond + Retumbo Results:
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