Gun Porn

Discussion in 'Sports & Outdoor Adventure' started by Yamaki, Mar 2, 2016.

  1. mfrench

    mfrench AK Subscriber Subscriber

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    I wouldn't have guessed hot metal.
    Does the air compression from air rifles cause any such threat due to heated metal? I was reading about the phenomenon of dieseling with air rifles, which concerned me.
     

     

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  2. Yamaki

    Yamaki Not For Hire Subscriber

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    Air rifles don't use a combustion process to fire the pellet unlike a powder loaded round of ammunition.

    I know nothing about dieseling in air rifles.
     
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  3. dB happy

    dB happy Active Member

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    The only time I've caused a fire shooting stuff was with exploding targets. I know tracers can cause fires, and dragons breath rounds for the shotgun will definitely cause a fire. I wouldn't worry about it with a pellet gun.
     
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  4. mfrench

    mfrench AK Subscriber Subscriber

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    I knew nothing about it, prior to using this one, referring to the Ruger .22
    While awaiting arrival I read about it, and studied it a bit more in-depth. It is a phenom that occurs from the sudden and extreme compression of air behind the pellet, with both spring, and nitro-piston types. It is supposed to get hot enough with that instantaneous compression that it ignites vapors from the guns internal lubrication, in the same process that drives diesel motors, sparkless ignition due to compression.
    I did witness this when I was sighting the Ruger. It only happened after shooting several rounds in a row (was shooting 5, then inspecting the group, and changing targets). I opened the breach, and, out came smoke. I've not seen it in one-off rounds.

    explained:
    Spring-piston air guns (or simply "spring guns" or "springers") operate by means of a coil spring-loaded piston pump assembly contained within a compression chamber separate from the gun barrel. Before shooting, the user need to manually cock the gun by flexing a lever connected to the pump assembly. The cocking drives the pump piston backwards and compress the spring until its rear engages the sear. The act of pulling the trigger disengages the sear, allows the spring to decompress and release the elastic potential energy stored within it, and pushes the piston forward thereby compressing the air in the pump cylinder. Because the pump outlet (located to the front of the pump) is directly behind the pellet sitting in the barrel chamber, once the air pressure has risen enough to overcome any static friction and/or barrel restriction holding back the pellet, the pellet is propelled forward by an expanding column of pressurized air. All this takes place in a fraction of a second, during which the air undergoes adiabatic heating to several hundred degrees and then cools as the air expands. This can also cause a phenomenon referred as "dieseling", where flammable substances in the compression chamber (e.g. petroleum-based lubricant) can be ignited by the compression heat like in a diesel engine, and lead to an afterburner effect with (often unpredictable) additional thrusts, as well as combustion smoke coming out of the muzzle upon firing. Most spring-piston guns are single-shot breechloaders by nature, but multiple-shot repeaters with magazine feeders have become more common in recent years.


    https://en.wikipedia.org/wiki/Air_gun
     
  5. MaxxVolume

    MaxxVolume AK Subscriber Subscriber

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    Colt Gold Cup National Match .45, circa 1990

    upload_2018-6-12_16-28-52.png
     
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  6. Yamaki

    Yamaki Not For Hire Subscriber

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    Nice 1911, MaxxVolume!

    Stll got it?
     

     

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  7. MaxxVolume

    MaxxVolume AK Subscriber Subscriber

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    It`s within arm`s reach, right now.... :)
     
  8. Yamaki

    Yamaki Not For Hire Subscriber

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    That's a proper response and a prudent action. :thumbsup:
     
  9. MaxxVolume

    MaxxVolume AK Subscriber Subscriber

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    A large-caliber 6-shot snubbie is what one might call "40 ounces of security on my hip" :)
    (S&W 625, .45 cal. Model Of 1989)

    upload_2018-6-12_17-10-18.png
     
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  10. Yamaki

    Yamaki Not For Hire Subscriber

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    I like that one! My EDC is a Springfield XDS

    [​IMG]

    It, too, is sitting right next to me. :)
     
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  11. MaxxVolume

    MaxxVolume AK Subscriber Subscriber

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    Very cool ! I like that little Crimson Trace unit, it`s the perfect size for that gun. Thankfully, there`s a good selection of compact .45s to be had these days. When I was shopping for one 25 years ago, the choices were REAL limited....I wound up buying a Para Ordinance P-12, which has just about the same footprint as a Glock 19, and holds 12+1 rounds of .45.
    It wasn`t quite how I wanted it, so I bought a few parts for it, and hot-rodded it a bit. It has been super reliable and accurate ever since....

    upload_2018-6-12_20-37-54.png
    upload_2018-6-12_20-59-38.png
     
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  12. Yamaki

    Yamaki Not For Hire Subscriber

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    CT made that model specifically for the XDS. It fits well, holds zero just fine and it has a very powerful green laser.

    While it's a bit of a handful, that XDS in .45ACP will definitely get the job done.

    I have a couple of other .45ACP chambered handguns, both of which are in a 1911 configuration and I love shooting them. They are just a bit too big for EDC.

    I need to make up my mind.... Will the next firearm be an optic capable 9mm or will I finally succumb to my lusting for a M1A Loaded from Springfield. Decisions, Decisions, Decisions... :D
     
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  13. dB happy

    dB happy Active Member

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    If anybody is looking to build an ar, psa has some sweet deals right now. I ordered everything I needed for a complete rifle for under $400.
     
  14. Yamaki

    Yamaki Not For Hire Subscriber

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    PSA makes good quality parts. Looking forward to seeing your build.
     
  15. 7.62

    7.62 Gearhead Subscriber

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    My words of the day......"PSA STOP TAKING MY MONEY" terrible place I had to remove myself from their email list.
     
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  16. Yamaki

    Yamaki Not For Hire Subscriber

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    The temptation of that "Add to Cart" button on the PSA site is almost irresistable. :D
     
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  17. dB happy

    dB happy Active Member

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  18. mfrench

    mfrench AK Subscriber Subscriber

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    novice steps in again for more help. please and thanks.

    The new air rifle, and pretty much any gun I've shot from off of the shelf have all had something in common,.. They're made for people a lot shorter than I am.
    I'm 6'6", and tall from the waist up (long torso).
    Whenever I try to sight a gun, I end up having to hold them with the gun butt mostly over my shoulder, with the bottom corner of the butt pushed into my colloar bone/shoulder interface. This is done so that I can get my eyes to the level of the sights/scope.
    I did this yesterday while I capped off probably a hundred rounds in resighting my air rifle. I am literally bruised and sore from the fairly hard point of the bottom "corner" of the of the new Ruger butt pad, because I cannot get the gun to fit to my shoulder properly.

    My point, and I've already sort of touched on this, Stand Off/See Through scope mounts. But, this time, not so much to allow sighting with the open sights. This time, I'm wanting to elevate the scope up higher than the mounting that is stock so that I can lower the gun butt down into my shoulder more. Make sense?

    Is my novice heiner thinking correctly here, or, is there something else I need to look at?

    @mkane
    You mentioned in a previous post,.. that I should look into how to shoot a springer air rifle.
    Could you expand a wee bit on how you do so?
    I found that I needed to use a heavy hand in keeping the thing from jumping on shooting it. I was shooting from a steady table top, and a sandbag that I use with my audio recording rig. I felt that I I had to hold the barrel down firmly when shooting it
     
  19. mkane

    mkane AK Subscriber Subscriber

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    Springers don't do well off a rest. Most are made for light game hunting and require a firm grip on the forearm. When I was into bench rest competition all used a PCP which didn't require anything specific as far as how it was held. Get some high scope mounts. There's lots of custom mounts out there.
     
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  20. mkane

    mkane AK Subscriber Subscriber

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