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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
G7 > G1 ; resistance to BC change
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<blockquote data-quote="Kevin Thomas" data-source="post: 504965" data-attributes="member: 15748"><p>The meplat is the small flat at the end of virtually any bullet, normally .050" to .060" on a match type hollow point, depending on how small of a knock out punch the maker is using. They close them up as much as possible, but it's virtually unavoidable that there will be something of a flat at the tip. From that point back, it's ogive, until it blends into bearing surface. Very noticeable on Secant ogives, not so much on Tangent ogives. You might take a look at Hatcher's Notebook for some more info on these earlier tests. Everyone today seems to assume that the G7 profile and long ogive bullet is a newer development. Not so. Some of the older drag models, such as the Hodsock, British 1929 or Aberdeen "J" projectiles were quite streamlined. I just got Bryan's newest version last week and haven't had a chance to get through it all yet, but I bet he mentions these somewhere in the historical descriptions.</p><p> </p><p>Either way, Hatcher's is a must read for any firearms buff.</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 504965, member: 15748"] The meplat is the small flat at the end of virtually any bullet, normally .050" to .060" on a match type hollow point, depending on how small of a knock out punch the maker is using. They close them up as much as possible, but it's virtually unavoidable that there will be something of a flat at the tip. From that point back, it's ogive, until it blends into bearing surface. Very noticeable on Secant ogives, not so much on Tangent ogives. You might take a look at Hatcher's Notebook for some more info on these earlier tests. Everyone today seems to assume that the G7 profile and long ogive bullet is a newer development. Not so. Some of the older drag models, such as the Hodsock, British 1929 or Aberdeen "J" projectiles were quite streamlined. I just got Bryan's newest version last week and haven't had a chance to get through it all yet, but I bet he mentions these somewhere in the historical descriptions. Either way, Hatcher's is a must read for any firearms buff. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
G7 > G1 ; resistance to BC change
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