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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Boat tail or flat base
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<blockquote data-quote="AJ Peacock" data-source="post: 175984" data-attributes="member: 4885"><p>There has been supposition of that idea, based on some research of laminar flow and the flame being orthogonal to the plane(s) of the base of the bullet.</p><p></p><p>I'm of the opinion that since the flame is 'different' between the flat base and boat tail bullets, that the throat erosion should be 'different'. Whether the difference is noticeable in the real world and whether its worse for flatbase or for BT bullets???</p><p></p><p>There are those on this and other forums that will state as fact that 'IT DOESN"T MATTER'. I think flat statements like that don't add to the collective knowledge (unless someone else is willing to jump in and argue the opposing viewpoint).</p><p></p><p>My personal opinion (came to me in a caffeine induced stupor, so nobody should argue too vehemently with it), is that for a instant, as the bullet is leaving the neck of the cartridge (BT's will leave a little sooner), that the heat of the powder will hit the throat an itsy bitsy (technical jargon) bit more than for a similarly weighted flat base bullet. Added to the paper on laminar flow that I read, I'd say BT's will lead to a tiny bit more throat erosion. But I wouldn't bet much on it (if there was a way to prove it), but I wouldn't bet anything against it ;-)</p><p></p><p>Just my personal, unsupportable, not worth argueing about it opinion.</p><p></p><p>AJ</p></blockquote><p></p>
[QUOTE="AJ Peacock, post: 175984, member: 4885"] There has been supposition of that idea, based on some research of laminar flow and the flame being orthogonal to the plane(s) of the base of the bullet. I'm of the opinion that since the flame is 'different' between the flat base and boat tail bullets, that the throat erosion should be 'different'. Whether the difference is noticeable in the real world and whether its worse for flatbase or for BT bullets??? There are those on this and other forums that will state as fact that 'IT DOESN"T MATTER'. I think flat statements like that don't add to the collective knowledge (unless someone else is willing to jump in and argue the opposing viewpoint). My personal opinion (came to me in a caffeine induced stupor, so nobody should argue too vehemently with it), is that for a instant, as the bullet is leaving the neck of the cartridge (BT's will leave a little sooner), that the heat of the powder will hit the throat an itsy bitsy (technical jargon) bit more than for a similarly weighted flat base bullet. Added to the paper on laminar flow that I read, I'd say BT's will lead to a tiny bit more throat erosion. But I wouldn't bet much on it (if there was a way to prove it), but I wouldn't bet anything against it ;-) Just my personal, unsupportable, not worth argueing about it opinion. AJ [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Boat tail or flat base
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