More caliber questions

Discussion in 'Technical Questions & Information' started by Gun Geezer, Aug 31, 2011.

  1. 45Auto

    45Auto Active Member

    Joined:
    Apr 9, 2008
    Messages:
    1,232
    The late Jeff Cooper was a great advocate of the .45 M1911. However, he advised shooters to outfit themselves with only as much power as they could effectively shoot in a combat situation.
  2. user

    user New Member

    Joined:
    Oct 16, 2007
    Messages:
    1,014
    Location:
    Northern piedmont of Va. and Middle of Nowhere, We
    All good reports. However, the big, heavy, slow-moving .45 ACP has a very steep trajectory, so you have to be really good at estimating the elevation adjustment if the target is moving towards you or away from you. Terrific for shooting stationary pieces of paper on a range. At the other end of the spectrum, the .357 magnum (particularly with a 125 grain bullet) has a pretty flat trajectory but way too much flash-bang-recoil. Commercially available 9mm and .38 spc. have relatively flat trajectories and sufficient kinetic energy at fifty yards to crush human bone, so under normal circumstances are more than adequate at normal defensive range. Unless the target is wearing body armor or a piece of a boiler under his poncho, those will work pretty well. Optimizing for any particular attribute results in impairment in other attributes. Study the ballistics charts for the brands and loads you're interested in and pick the compromise that suits your purposes.
  3. Old Grump

    Old Grump New Member

    Joined:
    Feb 21, 2010
    Messages:
    2,320
    Location:
    Little hut in the woods near Blue River Wisconsin
    9" drop at 100 yards, anybody can do it, just need to pay attention to the basics of grip, breath, sights, trigger.

    [​IMG]
  4. permafrost

    permafrost Active Member

    Joined:
    Feb 24, 2010
    Messages:
    1,788
    Location:
    Oklahoma, USA
    great shooting' Grump!
  5. ignats

    ignats Member

    Joined:
    Dec 18, 2011
    Messages:
    104
    The 1911 whether it be Colt or clone is a short recoil operated pistol. I don't know which S&W pistol you were shooting but the S&W Military & Police is also a short recoil pistol. It can be had in .22, 9mm, .357 Sig and .45 ACP. The full size version with 5" bbl weighs 26 ounces. The 40 S&W version is 24 ounces. The Colt unloaded weight is 2lb 7 ounces or 39 ounces. (Series 70 Colt). That's 15 ounces heavier than the S&W and that is what I think most people are feeling, the apparent recoil.

    The energy from the 40 S&W is fairly close to the .45 ACP. I converted a Super 38 (that had been converted to .38 wadcutter) to .40 S&W by buying a barrel from Fusion. It was pretty much a drop in and works fine. Fun to shoot too.

    .40 S&W
    Velocity Mass Energy
    1140 155 446.8456078
    980 165 351.5217391
    1000 180 399.2901508

    .45 ACP
    Velocity Mass Energy
    1140 165 475.6743567
    950 185 370.3693434
    890 230 404.1326531
  6. ignats

    ignats Member

    Joined:
    Dec 18, 2011
    Messages:
    104
    He also had a lot to do with the Bren 10 (remember Sonny Crockett on Miami Vice?) which fired a 10mm cartridge. A bit strong for most people. Hence the .40 S&W.
  7. Iron Eagle

    Iron Eagle Well-Known Member

    Joined:
    Feb 17, 2012
    Messages:
    1,081
    Location:
    Louisiana
    I have been considering a Stoeger Cougar in .40. It weighs 36 ounces, so recoil should not be an issue. 45's are still a bit steep right now. I know that I want one, particularly a xdm. Oh yeah!
  8. ignats

    ignats Member

    Joined:
    Dec 18, 2011
    Messages:
    104
    Another idea. The slide came from a Colt 38 Super that had been converted to a .38 Spl wadcutter target gun (these were used in a three pistol match or 2800 match). When that work was done, the gunsmith had to open up the face of the breech to accommodate the larger rim area of the .38 special cartridge which will allow the .40 S&W to fit (the case head of the .40 is just a little bit smaller in diameter than the .38 Spl.). I bought a Fusion barrel chambered in .40 S&W and had to do a little fitting but not much. It was almost a drop in fit.

    [​IMG]

    The Colt 38 Super frame was eventually mated up to a Series 70 38 Super slide and remains that way. That left me with the other slide which as luck would have it, fit perfectly on an Argentine Sistema frame that you see above.
  9. skullfr

    skullfr New Member

    Joined:
    Jul 11, 2012
    Messages:
    902
    Location:
    Beaumont,Texas
    no matter what you use marksmanship trumps caliber everytime.If you look at all the shootings caliber is not as important as placement.I practice aiming at the sniper triangle.It is the point at the base of the neck and the 2 nipples.A bullet in this area hit a vital that should incapacitate shortly.I feel the 10 ring on a shiloette is too low.The armpit hold is much better for putting rounds into a vital like the heart,lungs or spine.If drawn and fired from retention the shot will be low but should give enough time to backup while firing zippering up the main trunk.My main carry is a snub .357.I use 140 grn hydrashock.This round I found for me is good for it will give deep enough penetration but not excessive.The recommended depth by different agencies is 10-15 inches preferred.I usually get approx 13-14 inches.
Similar Threads
Forum Title Date
Technical Questions & Information More Star problems Jun 18, 2012
Technical Questions & Information More Mosin Nagant Help!! Failed attempt at gunsmithing I think?? Apr 18, 2012
Technical Questions & Information One more parking question Jan 13, 2012
Technical Questions & Information Looking for information on D More 32 cal. Dec 29, 2011
Technical Questions & Information What can I do to make a Mosin Nagant 91/30 more accurate? May 19, 2011