ammo speed question ?

G

gambler

Guest
the ammo speed printed on boxes is an average shot over four test barrels.
the speeds run mainly from 1030s to 1080s, my question is !

are these speeds random as to the way ammo is manufactured or are certain
speeds targeted ?

pistol ammo is much slower, and i know why.
 
Closest

Earl:
The speed on the box, is an estimate. I have found, that the ammo that closest matches the speed on the box when testing over a chronograph, usually shoots best in that rifle. That is a 25 shot string. Like you said, every barrel is different, so you gotta test them all.
 
thanks Fred, but what i'm asking is do ammo makers shoot for a certain speed
like 1030s or 1070s, or do they run a lot and what shakes out is what they get ?
looks like a difference of 40 fps would be no accident....dunno, jest askin:confused:
 
Pot Luck

I doubt they try to load for a specific speed. They are like we are, taking a shot in the dark. I believe each lot is run thru a chronograph at the end of each run. What ever it chronographs at in their test barrels, is what they print. Then again, they may be just drawing numbers out of a hat.
 
Ammo speed

Why worry about speeds and machine #. Just shoot Lapua one speed and one machine. Shoot and don"t get caught up in the trivia.
 
Last edited by a moderator:
why worry about speed ? cuz i like trivia !!! i'm on HERE all the time:D
but i do have some real good SK match..it's all 1053 fps;)
 
ammo speed question

SK Lapua {nano made in germany same as wolf ;
Your shooting German lapua
 
In case any interest , wolf m/t short from a freinds 40x 26 inch barrel chrono at 1055 fps and from my 14 inch pistol barrel it was 1105 fps . this would lead me to belive that the bullet is actually slowing down in the long barrel and as a result the pistol ammo should be slower than the rifle ammo.
 
ammo speed question

Your correct it does slow down a bit {barrel time}
That's why it's imporrtant to follow through with the shot.
I was told by a barrel maker that we run out of lube on the bullet at 22 inches also.
 
gambler said:
are these speeds random as to the way ammo is manufactured or are certain speeds targeted ?
Click to expand...
While actual average velocity of a lot is random, the intended velocity is generally below 1080 FPS on most match ammo. This is because above 1080 FPS, wind drift increases rapidly. Not a big deal indoors, but an issue when shooting outdoors.
 
after much research, blood sweat and beers:D
i've come to da conclusion.....all rifle ammo with listed feets per second on da box, is the TOP velocity rating fer that ammo !!
one maker( cuz i can't spell manufackturer) shakes out the feets per second
by lot number....who da thunkit ??:D
 
ammo question

I was told by CCi that all lots are tested for velocity.
That said when i complained about the low quality of the Green tag i got a argument . They asked who they should teem up with?
I had shot green tag in one particular rifle with great rusults then it went to crap. I was just trying to tell them that lot x was bad .{ thinking they would correct the problem. : LOL They didn't Care"'''
 
They Don't Care......that's the problem...old federal, the best ever stopped caring.....down the crapper went quality.........as long as we buy it they will never fix it !!
we're hung up on name brands and they know it, plus why should they care
when they are selling all they can make to hoarders
 
gerry,

exactly how did the barrel maker determine the lube runs out at 22 inches??

bill
 
Leading

Maybe its because a lot of longer barrels will lead up the last 4 or 5 inches. Not sure thats the answer, but when I have inspected some of my longer barrels, I have found this leading. In every case, the barrel had quit shooting tight groups. After carefule cleaning and removing that lead build up, the barrel came back to life.
 
Pops said:
In case any interest , wolf m/t short from a freinds 40x 26 inch barrel chrono at 1055 fps and from my 14 inch pistol barrel it was 1105 fps . this would lead me to belive that the bullet is actually slowing down in the long barrel and as a result the pistol ammo should be slower than the rifle ammo.
Click to expand...

I wonder how short the pistol bbl would need to be to get the velocity down to 1055 ? Then could you get the short bbl'ed pistol to shoot as well as the long bbl'ed rifle ? What effect would the short stiff bbl have on the use of a tuner ? Would you even need a tuner ? Would the lower bbl dwell time increase the accuracy potential ?

I have a CO2 Steyr 10 meter rifle. The actual bbl is only about 10 or 12" long but it is inside a shroud/bloop tube that is about 26" long.
 
For sight radius

The 26" tube is for a longer sight radius. A .177 cal air rifle does not need a long barrel to stabilize. There is pistol ammo available that will give you lower velosity. I shot some Eley Match Pistol, that was marked 1014 on the end flap, but chronographed at 989.4 at 10 ft. in front of the muzzel of a 26" barrel.
 
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