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Posted: 1/15/2009 6:19:05 PM EDT
| Do heavier bullets shoot farther than lighter ones? Assuming you have the right twist for the bullet? |
| There's more mass which means there is more inertia sustaining the bullet. Yes, you can heave a heavier object farther but you must also use more force to get it moving. In reference to various .223 rounds, the difference in weight is so small I doubt it makes much of a difference. |
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Get the 10 twist barrel. The quality of the barrel including the chamber and crown will have more bearing on accuracy than the twist rate. The 10 twist will permit you to shoot longer bullets such as the 155 grain Lapua Scenar.
The rest of the rifle has to be right, too. If the bedding is loose, the gun will likely string. Crappy scopes won't hold zero or have repeatable reticle adjustment, and crappy mounts come loose or shake. Bad triggers have the same effect as a good jerk, although maybe not to the same degree. Heavy bullets do not shoot farther. They tend to have higher BC's, which means lower drag, so the trajectory can be a tiny bit flatter and the wind doesn't blow the bullet around to the same degree, but this is only applicable to bullets of similar shape. For example, look up the BC of the .30 caliber 155 grain Scenar then compare that to the 180 grain Speer #2047 bullet with a round nose; the Scenar will whip the daylights out of that Speer bullet down range. |
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Quoted:
In gereral heavier bullets don't get blown around as much in the wind. Fail. Heavy bullets have higher BCs and therefore, keep velocity longer. Wind drift is a function of cross-sectional area, mass and most importantly, time of flight. That is why heavy bullets drift less. It isn't exactly like Galileo at the Leaning Tower of Pisa but it is close. The new Sierra Palma with its .504 BC should have LESS drift at 600 than the 168 MK even driven to the same velocity. But the 155 can be driven 150 FPS faster so it would BEAT the 168. |
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Quoted:
Quoted:
In gereral heavier bullets don't get blown around as much in the wind. Fail. Heavy bullets have higher BCs and therefore, keep velocity longer. Wind drift is a function of cross-sectional area, mass and most importantly, time of flight. That is why heavy bullets drift less. It isn't exactly like Galileo at the Leaning Tower of Pisa but it is close. The new Sierra Palma with its .504 BC should have LESS drift at 600 than the 168 MK even driven to the same velocity. But the 155 can be driven 150 FPS faster so it would BEAT the 168. |
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Quoted:
Well its for a 308 im looking at. its either a 1/10 twist for the ehavier bullets or a 1/12 twist. I would like to shoot long range but I want accuracy. Any help? And advice? Look at the chart.......... http://www.riflebarrels.com/faq_lilja_rifle_barrels.htm IMHO.......choose a twist in the "sweet spot." Rather than at the edge of the range. BTW........for ME and my M1A.......I got a 1/10 twist. Mostly cause the M1 uses that twist. And, that was what was offered. I had planned to use it with 168 gr. BTHPs. And, maybe something heavier (once in a while). The military M14 used a 1/12. But, it's more for the 150 gr. bullet and I don't shoot that weight all that often. Maybe, I could/would have been happy with a 1/11. You know.........COMPROMISE. Aloha, Mark |
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