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DPT Sarvo

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  1. #1
    Join Date
    Jul 2012

    20 - 28 gauge chamber inserts

    Convert your 20 gauge break open gun to 28 gauge.

    Tried your youngster on a 20 gauge and they still found the recoil to much ?
    Dont get a .410 !! thats nearly impossible to hit / kill things with.
    Try a real gauge This cartridge is highly underated here in NZ. I took it up due to shoulder surgery, and have used with great success for the last 3 seasons.
    Now I have committed and bought a whole gun these tubes are surplus.

    Try it out for a fraction of the cost of purchasing a new gun.

    Check out "gaugemate gold" on the interweb

    These cost me over $300 landed here and will sell for $175

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  2. #2
    R93 is offline
    Member R93's Avatar
    Join Date
    Feb 2012
    Westland NZ
    Whats the availability and average price like for 28 gauge ammo John? Cant say I have come across much of it but I spose I haven't really looked. I love the .410 but ammo it getting ridiculous

  3. #3
    GSP Mad Munsey's Avatar
    Join Date
    Mar 2012
    Sorry I can't see how they work ? What stops them ejecting / extracting , and what happens to wad once past the insert ? Pressure / gasses etc ? . As above thought they would have to be full length . Sorry but is playing on my mind

  4. #4
    Join Date
    Jul 2012
    Ammo prices vary, About $16 a box if you buy a flat at a time (250) from the likes of Mai mai supplies Or arond $22 if you buy a box from H & F etc Also depends on Cay bird ammo or hunting ammo .... clay ammo about 115 a flat.

    tubes stay in chamber because of the longitudinal split down the tube which turns it into a long spring so this means it will work as an extractor and present the case as in the top photo. I have shot them in a couple of 20's and neither had the power to eject the tube.
    Because they are held under tension in the chamber they have to be removed with the red handled tool ( 2nd photo ) Once fired you can pick the case out with a thumb nail flick. These work way better than "chambermates" that are removed from the gun once fired and a stick etc used to poke the fired case from the tube.

    what happens to the wad once it gets past the end of the tube...... it opens up to the diameter of the barrel continues on its way untill it gets to the choke then is effected by the choke just as a normal pattern full = full skeet = skeet.
    The experts say that it is like an over bored shotgun barrel .... same theory.
    In comparison to a proper 28 gauge shot from a proper gun it actually has better patterns ( this I have seen for myself )

    Sorry you cant properly see the split in the 2nd photo but the tube on the left just shows it on its right hand edge.

  5. #5
    Join Date
    Jul 2012
    Heres another picture to show the split down the length of the tube

    And here is their web site GaugeMate

    28 gauge cartridge on top ( RED )
    20 gauge on bottom ( YELLOW )

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