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Member
Picture of bendable
posted
that is hands down the answer to all accuracy questions?


for 7.62 x 39 ammo, .223, .243 winchester , or 7.62 x 54 ammo.

is it h.p.b.t. is that ! the magic bullet for most calibers,
is it the most consistent ?
is it the "go to " when purchasing factory ammo?





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Posts: 44258 | Location: Henry County , Il | Registered: February 10, 2004Reply With QuoteReport This Post
Freethinker
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People who are more expert than I will chime in, but for starters it’s not only its configuration that makes an accurate bullet. There are other factors that affect accuracy.

That said, it’s claimed there are several advantages to the open tip design. One is that the center of gravity is moved to the rear somewhat because most open tip bullet cores don’t extend to the tip of the bullet; there’s usually an airspace there. Another is that it’s difficult to manufacture bullets whose cores do extend to the tip, and also difficult to manufacture consistent pointed jackets that completely cover the tip. Something like a pointed soft tip bullet avoids the jacket problem, but not the center of gravity issue, plus exposed lead pointed tips are easily damaged, and the more pointed the easier.

Sharply pointed bullets like most of those with small open tips have higher ballistic coefficients than typical soft points designed for hunting. Some soft points like Speer’s Gold Dots in 223 Remington and 308 Winchester extend the jacket all the way to the edges of the tip, but they’re still not as sharp as most OT designs. One issue with OT bullets is that their meplats (tips) are often somewhat uneven. There’s even a tool available to trim them up. Whether that makes any difference in practice I don’t know, but ….

Some manufacturers like Hornady these days are producing match grade bullets with plastic tips. They’re not really new because Nosler developed the Ballistic Tip line decades ago, but the idea that plastic-tipped bullets could be used for match purposes is more recent. The advantage of plastic tips is that they’re less susceptible to damage and can be made very sharp to maximize ballistic coefficient. In addition, plastic tips can be set into bullets with a fairly large opening in the jacket, and that enhances expansion if the bullet is used for something other than ringing steel or punching paper. In 308 Winchester, for example, I find that Hornady’s TAP line produces virtually the same accuracy as Federal’s 168 and 175 grain Gold Medal Match loads that use Sierra OT bullets—at least with my rifles and skills.




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Posts: 36763 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
His diet consists of black
coffee, and sarcasm.
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The "match" rifle bullets I'm aware of are HP. With FMJ and soft point, the jacket is wrapped around the core nose first and rolled around the edges of the tail, leaving the lead base exposed. Any little variation in the hardness/softness of the exposed lead, the contours of the jacket crimping, etc., however tiny, can push the bullet slightly off course as it exits the muzzle. HP bullets are wrapped around tail first, leaving a smooth bullet base that is the same for every bullet. Less variation = more accuracy.


 
Posts: 18708 | Location: Johnson City/Elizabethton, TN | Registered: April 28, 2012Reply With QuoteReport This Post
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Picture of bendable
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I realize that accuracy is dependent on a half a dozen factors.

I am just wondering if there is one bullet configuration that is a "constant" , from one caliber to another





Safety, Situational Awareness and proficiency.



Neck Ties, Hats and ammo brass, Never ,ever touch'em w/o asking first
 
Posts: 44258 | Location: Henry County , Il | Registered: February 10, 2004Reply With QuoteReport This Post
fugitive from reality
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The HPBT is the most common type of bullet used in match grade centerfire ammunition.


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Posts: 5120 | Location: Newyorkistan | Registered: March 28, 2007Reply With QuoteReport This Post
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