An Overdue Discussion on .45 Auto

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  • bobzilla

    Mod in training (in my own mind)
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    Nov 1, 2010
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    .45 ACP is absolutely one of my favorite calibers. Next to that, for me would be .357 Magnum. For carry, my preference is .45 mostly because it's what I grew up shooting since I was just 9yo. I don't mind a nice 9mm, but frankly the round just looks weak to me just like the .380. Not bashing either of those calibers and I think they have their place. But they really just don't do it for me.
    Now, our old friend Churchmouse couldn't believe I when I said this but I have never shot a 1911. I've enjoyed shooting the M&P .45 shield, Sig P220, Ruger P90 and Ruger P345 but just never have gotten around to giving a 1911 a try. I'm confident that I would end up having to spend money if I do try one.
    As for the 9mm, well I've tried a few of them and they're alright. Just doesn't have the right feel to me
    There’s only one 9mm I do want and that is another of Master Brownings designs, the hi-power. But I still need a commander sized 1911. Compacts, officers and full sizes but never a commander length.
     

    BugI02

    Grandmaster
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    I do love a good .45 Auto, and have been told by those who understand the physics better than I can approach that it's inherently more accurate than many other offerings. Not enough to make a difference in anything I'm doing, mind you, but it's there.

    It lost a little of it's shine when I started playing with .45 Colt, though. And in my 'bad financial decisions' folder, I still have the desire to play with a .45 Super for no reason other than it sounds neat.
    Don't know what your opinion is of 4506s, but I believe they are considered plenty stout enough to run 45 super and the internal parts swaps are main spring and slide stop mostly. I've also heard of Kimber and even Delta Elite conversions but that's more of a song and dance and the Delta Elite especially had some metallurgical problems handling 10mm in the early versions

    It's been a while since I looked into it, but most people running 4506s seemed happy with the results. At that time quite a few clean 4506s seemed available on Walletbreaker for $5-700. I eventually looked it off because it was kind of just a rabbit hole for me
     

    rudyman

    Marksman
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    Nov 7, 2009
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    I too also want a bolt action 45 acp suppressed rifle, Delisle carbine ...not a k98.… But why not ?? Carry on in your pursuit..
     

    GunsCarsPlanes

    Plinker
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    Nov 29, 2021
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    1911 was my first firearm ever, still the most comfortable pistol to carry by far.

    I had a 5" S&W 1911 then upgraded to a 4.25 S&W 1911sc (scandium alloy). I've shot alot of 9's and maybe it's just me, maybe I need to shoot the same gun, weight, dimensions but I can't tell a recoil difference between the 45acp and 9mm.
     

    profjeremy

    Sharpshooter
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    Jun 30, 2020
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    45s biggest advantage, is it doesn't require a bunch of weird ammo to be subsonic. Most anything off the shelf is SubSonic.. by the time you find the 9mm subsonic stuff.. well its about the same price as the cheap 45 FMJ lol
    I used to be one of those who didn't really see the point in .45ACP... until I went down the suppression rabbit hole.

    While trying to find the best subsonic options, once I considered the difference between a 230gn, 1000fps (+P) .45 versus a 147gn, 1000fps 9mm, I saw the light! Even 300BLK is usually 220gn at roughly the same velocity, plus you get a 50% bigger hole with .45ACP!

    Though I'm not really a "1911 guy", I do have one that I enjoy shooting. There are also some really cool SMGs in .45ACP and I've always been a sucker for SMGs (I blame movies and video games)! My B&T APC45 Pro is my latest obsession.
     
    Last edited:

    Trapper Jim

    Master
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    Dec 18, 2012
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    I sorted pistols by caliber for sale on Gunbroker. 45 is still the second place by far. (excepting rimfire).
    Add rimfire, and its the third place.

    View attachment 330538

    40 S&W is just off the list at 7053, and this is with the current flood glut of dumped LE guns on the market now.
    No secret here.

    Workable cartridge.

    Government backed.

    Marketing infused.

    Competitive round.

    Added to a generation who was brought up with 9mm as status quo, and now you have a winner.

    If a downsize was to happen it Still should have been the 38 Super.
     

    92FSTech

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    Dec 24, 2020
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    If a downsize was to happen it Still should have been the 38 Super.
    I could get behind that idea based on the ballistic potential, were it not for the semi-rimmed nature of the cartridge. Rimmed cases...even little rims...have no place in a magazine-fed semi-auto. There's just too much potential there for rimlock and feed issues, especially when you move into double-stack magazines. The .38 super also had serious accuracy issues until they figured out that they needed to cut the chambers to stop headspacing on the rim and bottom out on the case mouth instead. Small issues that can be worked around, but issues nonetheless.

    9mm, in contrast, is rimless and even slightly tapered, which lends itself to feed reliability across a wide variety of platforms. Its shorter case allows for shallower magazines and thus a shorter length of pull, since most semi-auto designs contain the magazine in the grip. It lacks the case capacity of .38 Super, but isn't that far behind, and has a good reputation for performance of its own, without the engineering challenges presented by the super.
     

    BigMoose

    Grandmaster
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    Apr 14, 2012
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    I could get behind that idea based on the ballistic potential, were it not for the semi-rimmed nature of the cartridge. Rimmed cases...even little rims...have no place in a magazine-fed semi-auto. There's just too much potential there for rimlock and feed issues, especially when you move into double-stack magazines. The .38 super also had serious accuracy issues until they figured out that they needed to cut the chambers to stop headspacing on the rim and bottom out on the case mouth instead. Small issues that can be worked around, but issues nonetheless.

    9mm, in contrast, is rimless and even slightly tapered, which lends itself to feed reliability across a wide variety of platforms. Its shorter case allows for shallower magazines and thus a shorter length of pull, since most semi-auto designs contain the magazine in the grip. It lacks the case capacity of .38 Super, but isn't that far behind, and has a good reputation for performance of its own, without the engineering challenges presented by the super.
    Sounds like you want
    .38 Super Comp
    or
    9×23 mm Winchester
    or
    9×25mm Dillon
     

    92FSTech

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    Not really. I'm fine with 9mm, especially now that it's ubiquitous, inexpensive, and enjoys wide platform support. I was just pointing out why I believe that .38 Super would have been an inferior choice. Maybe it would have had a better chance at success had it borrowed some design elements from one of those.

    Getting back to the topic of the thread, I believe that .45 ACP was ahead of it's time somewhat, and enjoys continued success today in part because it's rimless.
     

    BigMoose

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    Anyway to return to the original premise.

    45 is still a solid choice, It is still the second most popular center fire pistol cartridge.
    And arguably the best choice for suppressor use.
    And its in a lot more things then 1911s, new offerings are often chambered in it. Along with some old standbys.


    px4stormspecialduty_listing0011.webp
     

    BugI02

    Grandmaster
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    No secret here.

    Workable cartridge.

    Government backed.

    Marketing infused.

    Competitive round.

    Added to a generation who was brought up with 9mm as status quo, and now you have a winner.

    If a downsize was to happen it Still should have been the 38 Super.
    Amen
     

    DadSmith

    Grandmaster
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    Oct 21, 2018
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    Anyway to return to the original premise.

    45 is still a solid choice, It is still the second most popular center fire pistol cartridge.
    And arguably the best choice for suppressor use.
    And its in a lot more things then 1911s, new offerings are often chambered in it. Along with some old standbys.


    px4stormspecialduty_listing0011.webp
    I like a 13rd+ 45acp better.
    Springfield
    Glock
    FN
    Taurus
    All make them. Probably several more I've failed to mention.
     

    Squid556

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    Feb 26, 2022
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    Wabash Co.
    45acp is not impractical, nor is it inefficient. There is no caliber that gets more downrange effect from 4 grains of Bullseye, than 45 acp.

    1. OP...where did you score the chamber inserts?
    Well I suppose it depends on how efficiency is defined. Powder burned per weight thrown id say you're right.

    I made that statement more from a cartridge design perspective and a size and weight perspective.

    The adapters in the photo were from some no name shop on eBay. They were kinda mediocre. Adapters I'm buying are from Chaszel. Reviews ive seen are really impressive.
     

    Squid556

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    Feb 26, 2022
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    All this talk about HKs in here I suppose I should add this story.

    At one time my whole family carried 45s. I had that GI Springfield 1911, brother had a Llama mini max 45, dad had an HK USP 45.

    So I set out one day to shoot all three for the fun of it. Don't remember what ammo was chosen. I used a rest and shot from the prone at 25 yards. Results really surprised me. Wish I had a pic to prove it but for those willing to believe me..

    LLama mini max 45 -- 6.5" 3 shot group
    Springfield GI 1911 -- 2.5" 3 shot group
    HK USP 45 -- 1.5" 3 shot group

    Granted it was only 3 shot groups but I was excited with the results.

    And I suppose while we are on the subject of HK 45s.... I got to spend a magical weekend with this Mk 23. Shot very well, sort of a bucket list for me.

    Unsurprisingly I wasn't able to make it shoot the legendary "1 hole at 50 meters". I don't know who started that claim but I don't think its possible.
    HK Mark 23 (1).jpg
     

    ECS686

    Master
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    Dec 9, 2017
    1,728
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    Brazil
    I was a revolver guy since that was my USAF sidearm but while stationed in Montana I obtained a Mil Spec Springfield that had the higher sights and that was a shooter. When I moved back here I became a reserve officer. They allowed 45’s but the training SGT asked that I not carry a 1911. Not so much for me but he didn’t want a few if the younger ones to follow LOL

    So I picked up an Sig 220 in 45 and that thing was great. Carried well shot like a laser just a perfect duty gun and why I love Sig 220 series to this day.

    I picked up a S&W 625 since I was still a revolver guy and like the 45 by now and did well at IDPA in the late 1990’s until the 5” Wheelguns wernt allowed. Picked up a few 9mm since I changed agencies since that was what we used.

    Got an early M&P 45 when they came out and despite the hate that early M&P shot as good as my Sig and the trigger was great. Then Missing my Springfield I picked up a Colt Competition and really like it accurate and was never not worked.

    Picked up a second M&P 45 when the 2.0 came out then a compact 2.0 M&P 45 full 10 rd grip and 4” barrel I refer as my Polymer commander

    Got a Springfield Operator when they introduced the new ones a couple years ago

    And my retirement job is a School
    protection officer so I run HK45 LEM

    So I almost have as many 45’s as I do Wheelguns LOL

    As far as that whole 9 vs 45 sure it’s a wash and shot placement is the real deal but just watching the power of bowling pins go off the table faster than the same 9mm hit you can’t deny it does hit harder.

    Maybe not flying 10 feet back and on fire harder but with the same solid hits there’s a difference on steel and pins

    Everyone should have at least one good 45!
     
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