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Thread: The purpose of ogives?

  1. #1

    The purpose of ogives?

    I remember placing my very first order on a set of 8S .308 cal bullet swaging dies. Now I remember being told that for my hunting needs. The 8S is good for the job. What is the purpose of ogives? And why is the 8S ogives is good for my application? Need some more info to understand. Are there specific ogives for hunting and or target shooting? Why that particular ogives? What’s the science behind it?

  2. #2
    Boolit Master

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    Quote Originally Posted by Darth-Vaj View Post
    What’s the science behind it?
    My understanding is within the constraints of OAL, chamber dimensions, etc., its the most efficient and aerodynamic
    way to transition from bore diameter, to OAL and produce the least amount of drag and in flight air resistance
    for the flattest shooting & best long range bullet performance.
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  3. #3
    Boolit Master
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    Quote Originally Posted by Darth-Vaj View Post
    I remember placing my very first order on a set of 8S .308 cal bullet swaging dies. Now I remember being told that for my hunting needs. The 8S is good for the job. What is the purpose of ogives? And why is the 8S ogives is good for my application? Need some more info to understand. Are there specific ogives for hunting and or target shooting? Why that particular ogives? What’s the science behind it?
    I don't think you are sufficiently confulsed yet and need to read this:

    http://bulletin.accurateshooter.com/...ves-explained/

    As conviluted as that story is it still is oversimplifying the science. Basically long gentle curves have lower drag but a bullet needs a bearing surface so the whole bullet can't be a compound curve. Oh, mach number matters too. Subsonic bullets are best if not pointed. Ideally high mach bullets would come to a sharp point but practically that does not work because they perform badly if damaged or inconsistent.
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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check