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Ok, a question

Discussion in 'Handguns: Revolvers' started by test drive, Nov 3, 2018.

  1. test drive

    test drive Member

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    Shooting a old aluminum chair today with my Smith Wesson model 19 snub, Rossi .357 six shot with 3inch bbl. and Ruger security six snub. The aluminum legs are square and hollow. The Ruger and Rossi entrance and exit hole were about the same nice roun hole a little larger than the bullet. The Smith entrance was much larger and jagged the exit hole large and violent looking. Same ammo, 125 magnum hollow point from about 20 feet. So is the smith going faster so the round realy opens up quick or is The Ruger and Rossi going faster where the round does not have time to expand ?
     
    robhof likes this.
  2. sgt127

    sgt127 Member

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    Speed has nothing to do with the difference in the entry hole as the bullets would not yet have expanded.

    Shoot the Smith at paper. If the bullets are keyholing, that would explain the difference.
     
  3. test drive

    test drive Member

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    Was punching paper earlier today it does not tumble.
     
    Michael Tinker Pearce likes this.
  4. BobWright

    BobWright Member

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    Speed does indeed make a difference in the entry hole. Not sure that was the case here, but a slower moving bullet tends to "tear" through while the higher velocity bullet sort of "drills."

    Try this on target paper, and there is a noticeable difference in the bullet hole. Whether this was your case or not, I can't say.

    Bob Wright
     
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  5. Catpop

    Catpop Member

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    Fresh backing boards (cardboard, etc.) also help give cleaner punch holes.
     
  6. Steel Hayes

    Steel Hayes Member

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    If the Rossi is a 2” barrel(assuming), I've found that the extra one inch makes a difference.
    My experience between my Rossi 68 3”(.38) and my Charter Undercover 2”(.38) , same ammo, the hollow points expanded much better thru the longer barrel.
     
  7. sgt127

    sgt127 Member

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    I agree but, we are talking about maybe 50 FPS difference between the barrel lengths he mentioned. 2 1/2”, 3” and 2 3/4”. I can’t imagine that making any difference in the appearance of the entry hole in aluminum.

    My response was more directed towards this comment:

    “So is the smith going faster so the round realy opens up quick or is The Ruger and Rossi going faster where the round does not have time to expand ?”

    No matter the velocity, neither is “opening up” quicker before the bullet impacts something.

    I’m not sure of the OP’s knowledge or experience. I have found people who believe a hollowpoint opens when it leaves the barrel. That misbelief would lead to the question asked.
     
    .308 Norma likes this.
  8. Pat Riot

    Pat Riot Member

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    My guess is the bullets are traveling a little slower out of the S&W.
     
  9. Odd Job

    Odd Job Moderator Staff Member

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    Would be good to do this test again with these changes:

    1) Use a chrony to quantify the velocity differences
    2) Shoot something homogeneous. My worry about the chair is that you might have subtle differences in how that chair is angled relative to the muzzle. There might be density differences at various places in the metal (by design or defect) also.
     
  10. Sistema1927

    Sistema1927 Member

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    My guess would be that since external ballistics is an inexact science, coupled with the fact that the target was not consistent, you received differing results that are probably not repeatable.
     
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  11. Monac

    Monac Member

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    "External ballistics is an inexact science"? Compared to what? When it comes to stationary targets, or even targets moving in just two dimensions, I think that the Coastal Artillery would have been surprised to hear that. Even in, say, 1925.

    PS - Maybe you meant terminal ballistics. That is different, and much more the issue here.
     
  12. Sistema1927

    Sistema1927 Member

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    Yes, my mistake. Terminal ballistics, not external ballistics.
     
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  13. the Black Spot

    the Black Spot Member

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    Barrel twist can be a part of it.
     
  14. Monac

    Monac Member

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    Sorry to have nitpicked, Sistema. I should have assumed what you meant without comment. Thanks for being courteous. I guess I'm just a fan of the Coastal Artillery!
     
  15. gwpercle

    gwpercle Member

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    Why are you shooting an aluminum chair ?
     
  16. Riomouse911

    Riomouse911 Member

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    Indeed! Now he doesn’t have anywhere to rest his aluminum can! :rofl:
     
    krinko likes this.
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