Barrel Length and Velocity, a little data

This is a discussion on Barrel Length and Velocity, a little data within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; I did some "testing" (it was mostly messing around) with my chronograph last week, and I decided to chrono some factory ammunition in different barrel ...

Results 1 to 2 of 2

Thread: Barrel Length and Velocity, a little data

  1. #1
    Senior Member Array Landric's Avatar
    Join Date
    Oct 2008
    Location
    Kansas City Metro
    Posts
    807

    Barrel Length and Velocity, a little data

    I did some "testing" (it was mostly messing around) with my chronograph last week, and I decided to chrono some factory ammunition in different barrel lengths to see how much velocity change I got. So, here is a little of what I found:

    Federal Classic 125 grain SJHP .357 Magnum, Average velocity:

    2 1/4" Ruger SP101: 1293 fps

    4" S&W 681-3: 1429fps

    Speer Gold Dot 125 grain Gold Dot .357 Magnum, Average velocity:

    2 1/4" Ruger SP101: 1242 fps

    4" S&W 681-3: 1392 fps

    Winchester Ranger T 230 grain .45 ACP, Average velocity:

    Glock 36: 844 fps

    S&W M&P45 (4 1/2"): 869 fps

    The .357 testing resulted in basically what I expected. On the other hand, I expected to see a lot more velocity lost from the short Glock 36, but it only lost 25 fps to the longer barrel M&P.

    Just a little food for thought.
    -Landric

    "The Engine could still smile...it seemed to scare them" -Felix

  2. Remove Ads

  3. #2
    Moderator
    Array bmcgilvray's Avatar
    Join Date
    May 2007
    Location
    Texas
    Posts
    9,877
    Hey Landric;

    Good food for thought. Glad you brought this up.

    It's only been a notion of mine but, in playing around over the chronograph with any of several .45 ACP revolvers and automatics around here along with shooting others' pistols and carbines for velocity, it seems that the .45 ACP has a tighter velocity range in which it operates than many other handgun cartridges.

    Perhaps it is due to the relatively low operating pressures. The 9mm demonstrates more velocity fluctuations when fired through various length barrels but then it operates at much higher pressures than does the .45 ACP.

Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. S&W 642 barrel length
    By North River in forum Defensive Carry Guns
    Replies: 7
    Last Post: November 17th, 2010, 03:00 PM
  2. Barrel length?
    By BlackJack in forum Defensive Rifles & Shotgun Discussion
    Replies: 9
    Last Post: September 4th, 2010, 06:45 AM
  3. Effect of Shortened Barrel Length on Muzzle Velocity
    By sentioch in forum Defensive Ammunition & Ballistics
    Replies: 11
    Last Post: June 6th, 2010, 09:31 PM
  4. 1911 barrel length
    By Bfunk in forum Defensive Carry Guns
    Replies: 12
    Last Post: January 25th, 2010, 10:15 PM
  5. Barrel length
    By Supertac45 in forum Reloading
    Replies: 5
    Last Post: June 2nd, 2008, 07:12 PM

Search tags for this page

.357 barrel length vs velocity
,
.357 velocity barrel length
,

357 ballistics barrel length

,

glock 36 barrel length

,
glock 36 fps
,
glock 36 velocities
,

glock 36 velocity

,
m&p 45 chronograph
,
ruger sp101 chronograph
,
ruger sp101 fps
,
sp101 chrono
,

sp101 chronograph

Click on a term to search for related topics.