ballistics numbers help?

[toledo]

Can anyone run numbers for a 158grn semi jacketed HP .357 bullet at 1000 fps? Im considering putting a pistol suppressor or a single shot .38/.357 rifle and am trying to get an idea of what could be expected. Lots of searching but nothings coming up.

Anyone have any guess what kind of increases would be see between published .38 numbers and a 16' barrel?

 

[minnesota]

Every barrel is different, every barrel will give different results,either extreme to one side of the spectrum to the other, but seldom the same. A revolver will traditionally produce lower velocities to a rifle, where there is no break to the cylinder to the barrel, because of pressure loss due to the gap. Their is not enough info in what was stated to give an appropriate guess.

 

[rcmodel]

Lyman #49 reloading manual has .357 data in seperate chapters for rifle, pistol, and T/C Contender.

Closest I can come to identical loads is:
158 grain XTP - 9.6 grains Blue Dot

4" Handgun barrel = 929 FPS
10" Contender barrel = 1,283 FPS
20" Carbine barrel = 1,442 FPS

rc

 

[223man]

http://www.ballisticsbytheinch.com/

Ballistics by the inch won't have your exact load but it provides an unprecedented level of data on velocity/barrel length for a variety of cartridges & factory loads.

DB

 

[gamestalker]

I'm loading a 158 gr. Gold Dot with 16.7 grains of H110 & 296. Velocity is consistently averaging 1250's. My Taurus 608 has almost the same barrel length, minus the compensation, and produce just about the same fps.. I'm also loading 125 gr. XTP's for my 38 spcl. load using Longshot, velocity average is 1080 fps. from the same revolver's above.
Give us a little more information regarding what you are trying achieve, maximum or minimum desired velocity.
Someone already mentioned the variance you'll likely experience between shorter barrels and carbine/rifles. With that established it would be very difficult to give you numbers that will match your firearms characteristics. Even two revolver's of same barrel length will often perform quite differently because of cylinder gap, rate of twist, cylinder dimension variances, and I'm sure I only touched the tip of the ice berg.