Hunting House » Legal Hunting » "…Rate of twist"
"…Rate of twist"
Question:
[...] #Barnes Bullet make their excellent Barnes-X in solid copper. #It has been established that the bullet’s velocity and length #(not weight) determines twist rate. Since the Barnes-X bullet [...] Quite so. About one to seven, it becomes nearly impossible to spin-stabilise the projectile, much like trying to get a pencil to stand up by spinning it. This is why longrods are fin stabilised. Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
The millitary uses spent plutonium for "bullets" on their cannons for piercing tanks, battle ships etc, very dense, very hard. Good luck finding that material. Gold has been used, easier to find than spent plutonium;) The book "Bullet Swaging" by Corbin, list other materials that have been tried. Bottom line is unless your a large army with a big budget, your stuck with lead, or lead jacketed with copper alloy. Barnes makes solid copper bullets but these are much less dense than standard bullets. — Good fishing, Matt Moore Visit Matt’s Severum World at: http://www.virtualseeds.com/matt.html Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
# # The millitary uses spent plutonium for "bullets" on their cannons for # piercing tanks, battle ships etc, very dense, very hard. Good luck finding # that material. Gold has been used, easier to find than spent plutonium;) # The book "Bullet Swaging" by Corbin, list other materials that have been # tried. Bottom line is unless your a large army with a big budget, your # stuck with lead, or lead jacketed with copper alloy. Barnes makes solid # copper bullets but these are much less dense than standard bullets. # — # I believe you are mistaken here, it is *not* "spent plutonium" but *depleted uranium* that the Army uses in their tank buster rounds. It is denser than lead and will cut through just about any other tank in the world. It is also *illegal* to make bullets out of this (for civilians) as it is specifically outlawed by the BATF. Jay Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
On top of what Matt wrote. You wouldnt be able to eat the meat because of the radiation. In the gulf war Iraqi tanks were heavily radiated by being hit by the spent plutonium rounds. All other possiblities have been tried but were found to be unusable because of barrel wear. Thanks Michael Oberle
# The millitary uses spent plutonium for "bullets" on their cannons for #piercing tanks, battle ships etc, very dense, very hard. Good luck finding #that material. Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
# # The millitary uses spent plutonium for "bullets" on their cannons for # piercing tanks, battle ships etc, very dense, very hard. Good luck finding # that material. Gold has been used, easier to find than spent plutonium;) # The book "Bullet Swaging" by Corbin, list other materials that have been # tried. Bottom line is unless your a large army with a big budget, your # stuck with lead, or lead jacketed with copper alloy. Barnes makes solid # copper bullets but these are much less dense than standard bullets. Actually, it’s depleted uranium, not plutonium. Not that it make any difference, you won’t get your hands on that either…… Fulmen Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
On top of what Matt wrote. You wouldnt be able to eat the meat because of the radiation. In the gulf war Iraqi tanks were heavily radiated by being hit by the spent plutonium rounds. All other possiblities have been tried but were found to be unusable because of barrel wear. Thanks Michael Oberle
# The millitary uses spent plutonium for "bullets" on their cannons for #piercing tanks, battle ships etc, very dense, very hard. Good luck finding #that material. Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
I’m not recomending the the depleted uranium, just responding to the original poster’s question if other materials have been used for bullets. — Good fishing, Matt Moore Visit Matt’s Severum World at: http://www.virtualseeds.com/matt.html Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
Group, This is a little off the subject, but since we’re talking about bullet materials… Barnes Bullet make their excellent Barnes-X in solid copper. It has been established that the bullet’s velocity and length (not weight) determines twist rate. Since the Barnes-X bullet is longer than a traditional lead bullet of the same weight, it makes since that it would require a faster twist. Right? I believe this is why so many people are having problems with the Barnes-X from an accuracy stand point. I believe we should be dropping down 20-30gr in weight for the copper Barnes-X to stabalize correctly. This gets the bullet closer to the "correct" length for that twist and also provides a needed velocity increase to keep it stable. Besides, with 100% weight retention, the Barnes-X has no problems in the penetration department. If you like to shoot 180gr lead bullets in your .30-06, try loading the 150gr Barnes instead. I’m sure it won’t lack the penetration you like, and it should help the accuracy. The velocity and energy increase should be welcomed as well. And have you looked at the BC’s these boat-tailed X-Bullets have?? Ohhh Weee! Impressive! My thoughts, Mike in Oregon
# Dan, # This is very good information that will answer a lot of questions. # Still, I bet a "twist" question will surface in the next couple of # week, despite your excellent post. # # I’m not a physicist, but I have done a good deal of reading on the # subject of exterior ballistics. It is my considered understanding # that the weight of the bullet has less impact on the stability for a # given twist rate than the length. # # I mention that, since for years, I tended to think that weight was the # actual factor that impacted stability. Then I read the excellent # ballistics section in the Sierra 50th anniversary reloading manual. # It occured to me that if you increase the weight for a given caliber, # using the same material, then the length must grow. DUH!!! # # Needless to say, I felt rather sheepish. Now, I’m wondering what # materials are denser than lead that can be made into shorter bullets # to use slower twist rates, but still impart more energy to the target. # Curious minds want to know! # P. Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
Group, This is a little off the subject, but since we’re talking about bullet materials… Barnes Bullet make their excellent Barnes-X in solid copper. It has been established that the bullet’s velocity and length (not weight) determines twist rate. Since the Barnes-X bullet is longer than a traditional lead bullet of the same weight, it makes since that it would require a faster twist. Right? I believe this is why so many people are having problems with the Barnes-X from an accuracy stand point. I believe we should be dropping down 20-30gr in weight for the copper Barnes-X to stabalize correctly. This gets the bullet closer to the "correct" length for that twist and also provides a needed velocity increase to keep it stable. Besides, with 100% weight retention, the Barnes-X has no problems in the penetration department. If you like to shoot 180gr lead bullets in your .30-06, try loading the 150gr Barnes instead. I’m sure it won’t lack the penetration you like, and it should help the accuracy. The velocity and energy increase should be welcomed as well. And have you looked at the BC’s these boat-tailed X-Bullets have?? Ohhh Weee! Impressive! My thoughts, Mike in Oregon
# Dan, # This is very good information that will answer a lot of questions. # Still, I bet a "twist" question will surface in the next couple of # week, despite your excellent post. # # I’m not a physicist, but I have done a good deal of reading on the # subject of exterior ballistics. It is my considered understanding # that the weight of the bullet has less impact on the stability for a # given twist rate than the length. # # I mention that, since for years, I tended to think that weight was the # actual factor that impacted stability. Then I read the excellent # ballistics section in the Sierra 50th anniversary reloading manual. # It occured to me that if you increase the weight for a given caliber, # using the same material, then the length must grow. DUH!!! # # Needless to say, I felt rather sheepish. Now, I’m wondering what # materials are denser than lead that can be made into shorter bullets # to use slower twist rates, but still impart more energy to the target. # Curious minds want to know! # P. Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
The term rate of twist indicates the distance in which the rifling in the barrel makes 1 complete turn. A barrel that is rated at 1:10, makes one complete ratation of rifling in every 10 inches of barrel length. The twist rate in conjunction with the velocity of the bullet creates spin. Usually the heavier the bullet for the caliber, (that translates into longer) the faster twist rate is required to stabalize the bullet. For example: A 52 grain, .223 diameter bullet will shoot fine out of a .223 Remington with a twist rate of 1:12 for calibers such as 22-25-, .220 Swift, or any number of wildcat calibers. In the .223 Remington round, it seems that the 1:10 twist rate is more accurate. When shooting the heavier .223 bullets, 60 grains and up, a faster twist rate i.e. 1:9 or 1:8 is prefferable. The 60 grain and heavier bullets are longer than the lighter 52 grain bullets and consequently require a faster twist to stabalize properly. Dan, (The Other One) Dan (The Other One) Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING
Response:
#The term rate of twist indicates the distance in which the rifling in the #barrel makes 1 complete turn. A barrel that is rated at 1:10, makes one #complete ratation of rifling in every 10 inches of barrel length. The #twist rate in conjunction with the velocity of the bullet creates spin. #Usually the heavier the bullet for the caliber, (that translates into #longer) the faster twist rate is required to stabalize the bullet. For #example: A 52 grain, .223 diameter bullet will shoot fine out of a .223 #Remington with a twist rate of 1:12 for calibers such as 22-25-, .220 #Swift, or any number of wildcat calibers. In the .223 Remington round, it #seems that the 1:10 twist rate is more accurate. When shooting the #heavier .223 bullets, 60 grains and up, a faster twist rate i.e. 1:9 or #1:8 is prefferable. The 60 grain and heavier bullets are longer than the #lighter 52 grain bullets and consequently require a faster twist to #stabalize properly. #Dan, (The Other One) # Dan, This is very good information that will answer a lot of questions. Still, I bet a "twist" question will surface in the next couple of week, despite your excellent post. I’m not a physicist, but I have done a good deal of reading on the subject of exterior ballistics. It is my considered understanding that the weight of the bullet has less impact on the stability for a given twist rate than the length. I mention that, since for years, I tended to think that weight was the actual factor that impacted stability. Then I read the excellent ballistics section in the Sierra 50th anniversary reloading manual. It occured to me that if you increase the weight for a given caliber, using the same material, then the length must grow. DUH!!! Needless to say, I felt rather sheepish. Now, I’m wondering what materials are denser than lead that can be made into shorter bullets to use slower twist rates, but still impart more energy to the target. Curious minds want to know! ..P Please remove the ".ns." in my email address. My hope is that it cuts down on the spam in my reader. Visit the rec.hunting and rec.hunting.dogs FAQ Home Page at: http://sportsmansweb.com/hunting/ To leave the Hunting listserv list, send a message with SIGNOFF HUNTING