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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
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<blockquote data-quote="Fiftydriver" data-source="post: 58449" data-attributes="member: 10"><p>Radunn,</p><p></p><p>With this rifle weight I would say you could certainly reach the performance levels you want.</p><p></p><p>I to am a believer in the TKO ideals. Being a big bore handgun hunter I have seen the results of heavy, big bore bullets traveling at relatively slow velocities. They are impressive for sure.</p><p></p><p>Still in small bore rifles, anything under 375, I much prefer Sectional Density over shear frontal area. </p><p></p><p>My comments about the ranging ability of the 358 STA were based on bullets which I feel are appropriate for that round and the game this size of round is best suited for, that being 250 gr at the minimum and up to the 300 to 310 gr pills. This is where I feel the 358 really begins to shine in performance, rivaling and exceeding the 375 H&amp;H by a fair margin.</p><p></p><p>It is true the lighter bullets can be driven quite fast in the STA. They have relatively small baring surfaces which combined with the large bore size, allows the use of heavy charges of faster burning powder which will create some impressive velocities.</p><p></p><p>My concern with the 225 gr .358" bullets is that they have a relatively low S.D. value at .251. For thin skinned game this is certainly more then enough but for heavy game such as elk and moose and any dangerous game, I feel this is to low.</p><p></p><p>Comparing this to a 225 gr .338" bullet with a S.D. of .281 given similiar velocity and bullet construction, the 338 will far out penetrate the 358 everytime, especially on tough angles and with shots though heavy bone are required.</p><p></p><p>I personally like S.D. values in the .280 or higher range for heavy game or dangerous game, the 250 gr .358" bullet meets this level but the same bullet weight in the 338 has a S.D. of .313.</p><p></p><p>The TKO formula is for non expanding bullets so it really is not ovely useful for expanding soft nose designs. It can be somewhat useful when comparing bullets of similar design but it does not take in the huge variable of bullet expansion.</p><p></p><p>Again, the 358 is a great caliber, it is just best served with bullets in the 250 to 300 gr range then the lighter 225 gr bullets, especially in a round that can produce this level of velocity.</p><p></p><p>As for bullets, for extreme range shooting the 338 has several bullets designed for shooting out to 1000 yards ranging from 250 to 350 gr in weight.</p><p></p><p>The 358 does not have any bullets designed for this type of shooting. This may not be a concern to you at all if you do not intend to do this type of shooting.</p><p></p><p>Still, the 338 family of bullets has received vastly more testing and research as far as accuracy and consistancy goes. This generally shows up in the average accuracy a roudn will produce. It will only shoot as well as the bullets used and on average, I would say 338 bullets are more consistant then 358 bullets. </p><p></p><p>Again, for strictly big game hunting, this is a moot point.</p><p></p><p>Good Shooting!!!!</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 58449, member: 10"] Radunn, With this rifle weight I would say you could certainly reach the performance levels you want. I to am a believer in the TKO ideals. Being a big bore handgun hunter I have seen the results of heavy, big bore bullets traveling at relatively slow velocities. They are impressive for sure. Still in small bore rifles, anything under 375, I much prefer Sectional Density over shear frontal area. My comments about the ranging ability of the 358 STA were based on bullets which I feel are appropriate for that round and the game this size of round is best suited for, that being 250 gr at the minimum and up to the 300 to 310 gr pills. This is where I feel the 358 really begins to shine in performance, rivaling and exceeding the 375 H&H by a fair margin. It is true the lighter bullets can be driven quite fast in the STA. They have relatively small baring surfaces which combined with the large bore size, allows the use of heavy charges of faster burning powder which will create some impressive velocities. My concern with the 225 gr .358" bullets is that they have a relatively low S.D. value at .251. For thin skinned game this is certainly more then enough but for heavy game such as elk and moose and any dangerous game, I feel this is to low. Comparing this to a 225 gr .338" bullet with a S.D. of .281 given similiar velocity and bullet construction, the 338 will far out penetrate the 358 everytime, especially on tough angles and with shots though heavy bone are required. I personally like S.D. values in the .280 or higher range for heavy game or dangerous game, the 250 gr .358" bullet meets this level but the same bullet weight in the 338 has a S.D. of .313. The TKO formula is for non expanding bullets so it really is not ovely useful for expanding soft nose designs. It can be somewhat useful when comparing bullets of similar design but it does not take in the huge variable of bullet expansion. Again, the 358 is a great caliber, it is just best served with bullets in the 250 to 300 gr range then the lighter 225 gr bullets, especially in a round that can produce this level of velocity. As for bullets, for extreme range shooting the 338 has several bullets designed for shooting out to 1000 yards ranging from 250 to 350 gr in weight. The 358 does not have any bullets designed for this type of shooting. This may not be a concern to you at all if you do not intend to do this type of shooting. Still, the 338 family of bullets has received vastly more testing and research as far as accuracy and consistancy goes. This generally shows up in the average accuracy a roudn will produce. It will only shoot as well as the bullets used and on average, I would say 338 bullets are more consistant then 358 bullets. Again, for strictly big game hunting, this is a moot point. Good Shooting!!!! Kirby Allen(50) [/QUOTE]
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