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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 vs 338
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<blockquote data-quote="Fiftydriver" data-source="post: 252312" data-attributes="member: 10"><p>Ballistically, they are so close it would be hard to tell one apart from the other if launched at the same muzzle velocity. Sierra lists the BC of the 300 gr SMK as 0.768</p><p> </p><p>In my testing with my 338 AM, I have to use 0.81 to get the drop chart to match up perfectly with the actual bullet flight of the 300 gr SMK.</p><p> </p><p>In my testing of my 375 AM, using the 350 gr bullet, I was able to drive them to roughly the same velocity of the 300 gr in the 338 AM, around 3300 fps.</p><p> </p><p>Trajectory for one can be used for the other they are that close. Only real difference I have see is that the 375 has a larger frontal area and higher kenetic energy payload and seems to hit harder.</p><p> </p><p>I have only tested these bullets out to around a mile. I can not comment about shooting them to 3000 yards but I can say that I have tested the 300 gr SMK in 338 extensively and at my altitude of around 3500 ft, around 2800 yards is max range with super sonic velocity. Past that, accuracy goes to hell because the bullets become unstable.</p><p> </p><p>It may be possible but I find it unlikely that the 350 gr SMK would be consistant out to 3000 yards as it will drop below super sonic velocity well short of that range and I have yet to see a SMK perform well after dropping out of super sonic velocity.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 252312, member: 10"] Ballistically, they are so close it would be hard to tell one apart from the other if launched at the same muzzle velocity. Sierra lists the BC of the 300 gr SMK as 0.768 In my testing with my 338 AM, I have to use 0.81 to get the drop chart to match up perfectly with the actual bullet flight of the 300 gr SMK. In my testing of my 375 AM, using the 350 gr bullet, I was able to drive them to roughly the same velocity of the 300 gr in the 338 AM, around 3300 fps. Trajectory for one can be used for the other they are that close. Only real difference I have see is that the 375 has a larger frontal area and higher kenetic energy payload and seems to hit harder. I have only tested these bullets out to around a mile. I can not comment about shooting them to 3000 yards but I can say that I have tested the 300 gr SMK in 338 extensively and at my altitude of around 3500 ft, around 2800 yards is max range with super sonic velocity. Past that, accuracy goes to hell because the bullets become unstable. It may be possible but I find it unlikely that the 350 gr SMK would be consistant out to 3000 yards as it will drop below super sonic velocity well short of that range and I have yet to see a SMK perform well after dropping out of super sonic velocity. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 vs 338
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