[that left handed guy]

how far will a 7.62x54 bullet travel in one second when fired from an M-44?

 

[ORD]

It depends greatly on what ammo you are using, but...........................

148-150gr stuff will get around 2750fps

180gr around 2600fps+

200gr around 2500fps

 

[that left handed guy]

so doing the math I'm getting that the bullet should travel 900 yards in a second, does that sound right?

 

[cdknox]

Yes...assuming of course that the bullet traveled the same speed and that gravity, air resistance, etc were not present.

 

[ORD]

so doing the math I'm getting that the bullet should travel 900 yards in a second, does that sound right?

What is the real question here other than how fast does the bullet travel from muzzle to point A? Are you attempting to calculate a dope table for your rifle?

There is a lot more to the whole equation than: 1) what bullet are you shooting; 2) what is the manufacturer stated velocity (or chronograph reading); and 3) divide fps by 3 to determine yards per second; and 4) use yards per second to determine how fast your bullet gets from the muzzle to your desired range. If only ballistics, wind doping and range doping were that easy...life would be so much simpler!!

 

[vafish]

so doing the math I'm getting that the bullet should travel 900 yards in a second, does that sound right?

Probably quite a bit less than that. I would guess some where around 600 yards in a second.

Why?

The 180 gr bullet is doing 2625 fps at the muzzle, but is slowing down continuously due to air resistance. At 100 yards it is only going 2,300 fps. By the time it gets out to 500 yards it is only going half that speed. By the time you get out to 1,000 yards it's slowed down to under 850 fps.

Here's how I get 600 yards.

If you use Hornady's ballistic calculator Hornady you can punch in the bullet weight, 180 gr, the Ballsictic Coeficient ,267 (from Wnchesters web site) and the muzzle velocity of 2625 and it will give you a nice chart with the velocities and energy out to 1,000 yards.

Now the bullet is traveling 2625 fps at the muzzle and only 2303 at 100 yards. So from 0-100 yards it is averaging 2,463 fps. At 2,463 FPS it will take the bullet .122 of a second to travel 100 yards (300 feet divided by 2,463) Continue taking the average speed for each 100 yards, figure the time needed to travel that 100 yards, and start adding them up until you get to 1.0 seconds.

It also seems to work if you take the velocity at the muzzle (2,625 fps) and the velocity at 600 yards (1,128 fps), add them and divide by 2 to get the average velocity across the 600 yards. You get 1,876 fps. There are 1,800 feet in 600 yards.

 

[jfdavis58]

If your doing a lot of this 'what if' type work, let me expand on the suggestion to use Hornady site with a related suggestion that you get your own ballistic program. "PointBlank" is free with a free registration at the "HuntingNut" website; the owner is no-nonsense/no-nag.

This program doesn't 'install' into the windows kernal, it sit on your desktop and runs quietly when launched, goes away cleanly when closed and doesn't appear to leave any registry junk. It can be used to create a data file(s) of gun and load info. It provides ballistic trajectory in both tabular and graphic formats which can be printed. It calculates time of flight.

 

[einheit 13]

out of a 20" carbine (M44, M38, 91/59,91/38) A 148gr Wolf x54r will loose about 200-300fps for every 100yds traveled. From 91/30s,M27s M28s, M39s, M24s, the same ammo will lose roughly the same for every 100yds. There is also a muzzle velocity difference of 200-500fps between the carbine and rifle depending on the ammo, the M24 and M91s have the highest velocities because of the longer barrel. The ammo was designed to be fired from a 24"-28" barrel. 1 second of flight time should be roughly 550yrds give or take for wind/humidity.

Bullet Velocity to 500 yards in Feet per Second
Distance (yds)
0 50 100150 200 250 300 350 40450 500
M44 2554 2463 2374 2287 2201 2118 2036 1955 1877 1801 1728
M28 2708 2613 2521 2431 2342 2256 2171 2088 2007 1927 1850
M91/30 2754 2659 2566 2475 2385 2298 2212 2128 2046 1966 1887
M91 (Finnish) 2845 2748 2653 2560 2469 2379 2292 2206 2123 2041 1960
M91 (Russian) 2706 2612 2520 2430 2341 2255 2170 2087 2006 1926 1849​