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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
270 bullet best for whitetailed deer
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<blockquote data-quote="Teri Anne" data-source="post: 2330797" data-attributes="member: 118816"><p>Faster is not always better, especially with bullets made for hunting. When a bullet is designed the maximum spin rate is designated based on normal muzzle velocity and the normal rate of barrel twist of the particular caliber. For the .270 and other similar rounds if you check the different manufacturers you will find that the factory muzzle velocities range between 2900 and 3100 fps. The bullets for these calibers base their penetration and expansion on those design muzzle velocities. When you increase the muzzle velocities you increase the bullet spin and in some cases cause the bullet to self destruct in flight. Had a friend who wanted to pump up a .243 to see how fast it could go. Don't ask me what his load was, I never bothered to find out because of the following issue. At 3900 fps the bullet held together but accuracy diminished as speed increased. At 4000 fps bullet held together but group size diminished to about 4 MOA. At 4100 fps the bullet never made it to the target. Standing behind him one could notice a puff of smoke about 20 yards down range. That puff was when the bullet flew apart in flight. Getting back to your dilemma of of the bullet flying apart at 65 yards the bullet was already spinning close to the self destruct point so with the slightest provocation, such as hitting a deer it simply self destructed because it's design spin rate had been exceeded. It was through no fault of the bullet that happened. Another thing for hunters to keep in mind is velocity vs bullet expansion rate. If a bullet is going too fast when it hits it's target while it will expand it will not reach maximum expansion before exiting the other side of the deer. Will it still kill the deer, yes providing you sent it through the boiler room before it exited stage right. I have found that slightly slower velocities have a tendency to perform when penetrating the animal allowing full expansion to occur before either exiting or stopping inside the animal.,</p></blockquote><p></p>
[QUOTE="Teri Anne, post: 2330797, member: 118816"] Faster is not always better, especially with bullets made for hunting. When a bullet is designed the maximum spin rate is designated based on normal muzzle velocity and the normal rate of barrel twist of the particular caliber. For the .270 and other similar rounds if you check the different manufacturers you will find that the factory muzzle velocities range between 2900 and 3100 fps. The bullets for these calibers base their penetration and expansion on those design muzzle velocities. When you increase the muzzle velocities you increase the bullet spin and in some cases cause the bullet to self destruct in flight. Had a friend who wanted to pump up a .243 to see how fast it could go. Don't ask me what his load was, I never bothered to find out because of the following issue. At 3900 fps the bullet held together but accuracy diminished as speed increased. At 4000 fps bullet held together but group size diminished to about 4 MOA. At 4100 fps the bullet never made it to the target. Standing behind him one could notice a puff of smoke about 20 yards down range. That puff was when the bullet flew apart in flight. Getting back to your dilemma of of the bullet flying apart at 65 yards the bullet was already spinning close to the self destruct point so with the slightest provocation, such as hitting a deer it simply self destructed because it's design spin rate had been exceeded. It was through no fault of the bullet that happened. Another thing for hunters to keep in mind is velocity vs bullet expansion rate. If a bullet is going too fast when it hits it's target while it will expand it will not reach maximum expansion before exiting the other side of the deer. Will it still kill the deer, yes providing you sent it through the boiler room before it exited stage right. I have found that slightly slower velocities have a tendency to perform when penetrating the animal allowing full expansion to occur before either exiting or stopping inside the animal., [/QUOTE]
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270 bullet best for whitetailed deer
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