feet per second for 1000 yards
- Thread starter niceone
- Start date
memilanuk
Gold $$ Contributor
Could you possibly be more vague? 
If you want to know how fast the bullet needs to be going to stay above the speed of sound @ 1k... the answer is 'it varies'. Assuming a standard temperature of about 59F,which is what a lot of ballistics programs start out with as part of the 'standard' atmo conditions), the speed of sound is approx. 1117fps. So... if your bullet is going faster than that, you should be good to go. Remember that the speed of sound varies with temperature a bit - @ 30F its ~1085, @ 90F is closer to 1150fps. Most people consider it a Good Thing to be going a bit faster than that - like 1300+ fps to stay out of the region right around the speed of sound, aka the 'trans-sonic region, where bullets can experience some degree of turbulence.
So in the end, the answer becomes: as fast as you can safely and accurately push them out the end of the barrel
If you want to know how fast the bullet needs to be going to stay above the speed of sound @ 1k... the answer is 'it varies'. Assuming a standard temperature of about 59F,which is what a lot of ballistics programs start out with as part of the 'standard' atmo conditions), the speed of sound is approx. 1117fps. So... if your bullet is going faster than that, you should be good to go. Remember that the speed of sound varies with temperature a bit - @ 30F its ~1085, @ 90F is closer to 1150fps. Most people consider it a Good Thing to be going a bit faster than that - like 1300+ fps to stay out of the region right around the speed of sound, aka the 'trans-sonic region, where bullets can experience some degree of turbulence.
So in the end, the answer becomes: as fast as you can safely and accurately push them out the end of the barrel
Your question is open to several different interpretations but since this is mainly a paper punching forum, I assume you mean target accuracy at 1000 yds. If I am in the butts pulling your target board I want to hear the supersonic 'crack' of your bullet going overhead as well as see a spurt of dirt on the backstop. If I only see a spurt of dirt with no 'crack' then you are going subsonic and I am surprised that you even hit the board.
Since you did not indicate any cartridge or caliber in your question, it is difficult to specify a muzzle velocity to be supersonic at 1000 yds.
Since you did not indicate any cartridge or caliber in your question, it is difficult to specify a muzzle velocity to be supersonic at 1000 yds.
This is nit-picking to be sure, but nowhere does it say that a bullet has to be super-sonic at 1000 yards to be accurate. In most cartridge and bullet combinations it sure does help and in many it's almost imperative. But, if bullets suddenly went crazy when the velocity fell below the speed of sound we wouldn't be able to shoot the longer distances, would we?
I have seen some decent 1000 yard groups with every bullet a keyhole. But, I wouldn't recommend it if you expect to hear your name called during the award ceremonies.
Ray
I have seen some decent 1000 yard groups with every bullet a keyhole. But, I wouldn't recommend it if you expect to hear your name called during the award ceremonies.
Ray
The windage chart for the 6BR and 107 MKing in the 'Sinclair Long-range Record Book' indicates a muzzle velocity of 2900 fps.
Hope this helps.
Hope this helps.
'I have seen some decent 1000 yard groups with every bullet a keyhole. But, I wouldn't recommend it if you expect to hear your name called during the award ceremonies.'
Unless it's your target puller asking you to come see the bruises on his body from the bullets bouncing back & hitting him
Unless it's your target puller asking you to come see the bruises on his body from the bullets bouncing back & hitting him
Here is a speed of sound calculator: http://hyperphysics.phy-astr.gsu.edu/hbase/sound/souspe.html
Remember to use the correct units of temperature. ie C or F and do not enter anything else. Just type in the temperature and then move the mpouse pointer to somewhere else on the page and click. It gives fps, meters per second, and miles per hour.
George
Remember to use the correct units of temperature. ie C or F and do not enter anything else. Just type in the temperature and then move the mpouse pointer to somewhere else on the page and click. It gives fps, meters per second, and miles per hour.
George
Nice one.
Its a good question that most folks have when they start getting into this type of shooting and start to expand out to diffrent distances, you are not alone and this very same question comes about very very often.
Some advice would to be to include all your particulers with your question because as Monte points out it all matters in the final answer.
Gun: Caliber,Bullet type and brand, current velocity,
Location: Elevation, average temp of area,
Type of shooting involved: Game, paper targets, Steel/ tactical. F class, Prone with a sling,
This is some of the information folks like Monte who has alot of shooting experience needs to give a good answer.
I have a little advice as well, Since your here on the forum and like to read about balistics and guns i would advise to look up on the WWW JBM small arms balistic computer.
Look for exteranal balistics simplified and click into that program. I can garentee this will keep you ocupied for hours on end while you compare diffrent bullets and velocities and your mind starts to ponder what if. Boy have i spent a ton of time messing with such programs as im sure many who are reading this have done also.
If you look into the colume that that gives the Mach number at 1000 yards you will see what the speed of sound is. above Mach 1 is waht your looking for. and in the infomation part at the top of the calculated spread sheet it will give the exact answer you are looking for. SPEED OF SOUND.
Make sure you fill in all the correct information, Temp, Elevation, wind speed, barometric pressure, bullet velocity at the muzzel ect ect.
Best part of this program its FREE FREE FREE FREE!!!!
Just to thow this in, I went to a 1000 yard match yesterday with a good fiend of mine and he shot his 6BR with 105 Berger VLD's Very succesfully. His velocity like my 6BR is at the 2820 to 2850fps. not very fast but very very accurate. Limited only by the shooters ability to shoot it to its potential. During his last match of twenty shots I was pulling and marking his target and he had five rounds that went into less than 5' shooting iron sights and out of a sling. He hit the spotter four times in a row some where around shots 6,7,8,&9
the 6BR will get it done.
Have fun with the Balistics program, theres alot of info on it and its ALL usefull.
Good luck, be safe and have fun.
RussT
Its a good question that most folks have when they start getting into this type of shooting and start to expand out to diffrent distances, you are not alone and this very same question comes about very very often.
Some advice would to be to include all your particulers with your question because as Monte points out it all matters in the final answer.
Gun: Caliber,Bullet type and brand, current velocity,
Location: Elevation, average temp of area,
Type of shooting involved: Game, paper targets, Steel/ tactical. F class, Prone with a sling,
This is some of the information folks like Monte who has alot of shooting experience needs to give a good answer.
I have a little advice as well, Since your here on the forum and like to read about balistics and guns i would advise to look up on the WWW JBM small arms balistic computer.
Look for exteranal balistics simplified and click into that program. I can garentee this will keep you ocupied for hours on end while you compare diffrent bullets and velocities and your mind starts to ponder what if. Boy have i spent a ton of time messing with such programs as im sure many who are reading this have done also.
If you look into the colume that that gives the Mach number at 1000 yards you will see what the speed of sound is. above Mach 1 is waht your looking for. and in the infomation part at the top of the calculated spread sheet it will give the exact answer you are looking for. SPEED OF SOUND.
Make sure you fill in all the correct information, Temp, Elevation, wind speed, barometric pressure, bullet velocity at the muzzel ect ect.
Best part of this program its FREE FREE FREE FREE!!!!
Just to thow this in, I went to a 1000 yard match yesterday with a good fiend of mine and he shot his 6BR with 105 Berger VLD's Very succesfully. His velocity like my 6BR is at the 2820 to 2850fps. not very fast but very very accurate. Limited only by the shooters ability to shoot it to its potential. During his last match of twenty shots I was pulling and marking his target and he had five rounds that went into less than 5' shooting iron sights and out of a sling. He hit the spotter four times in a row some where around shots 6,7,8,&9
the 6BR will get it done.
Have fun with the Balistics program, theres alot of info on it and its ALL usefull.
Good luck, be safe and have fun.
RussT
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