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Thread: FWB 800 Junior

  1. #1
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    FWB 800 Junior

    I have an FWB 800 Junior 10m rifle, and due to problems with cataracts I’m finding it difficult to use the diopter sights. Does anyone know if the power can be increased to sub 12 ft/lbs?

  2. #2
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    The rifles in standard Match format are already sub 12ftlbs and running at around half of that power. I presume that you want it to be closer to the 12ftlb mark (which I believe is difficult to achieve). On that basis here's a copy of my contact with FWB regarding similar.

    Q : can the Muzzle velocity of the Rifle be increased at all, even if by a small amount. If so, is this something that the owner can carry out, or are the services of your UK representative required.

    A : the muzzle velocity can slightly be increased. For doing this the action will have to be taken off the stock. If the rifle is in shooting direction you will find in the rear section of the trigger housing the firing pin screw beneath the absorber tube (see attachment). By means of this screw "B" the muzzle velocity can be adapted a little. Screw "A" secures against independent twisting of the firing pin screw. Loosen screw "A". Set the velocity - turning the firing pin screw clockwise will increase the muzzle velocity - turning it counterclockwise will decrease the muzzle velocity. Please note: if the firing pin screw is screwed in too much the firing pin will open the valve and the compressed air cylinder will deflate air. As soon as the muzzle velocity is set tighten screw "A" again.

    As far as I am aware there are a couple of specialists out there who can modify the 800 series for 12ftlbs but TBMK they need to change a few parts to do so. I believe that FWB themselves had problems doing it on their own rifles in the factory (for an extended period of time as far as I am aware).

    HTH, Vic Thompson.

  3. #3
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    FWB 800 Junior

    Thank you Vic, you’ve been extremely helpful. My original question wasn’t very well worded, but yes, I wanted to see if I could get it nearer the 12 ft/lb mark, but it looks very much like it would be better left as it is. Many thanks again for taking the trouble to enlighten me on the work involved.

  4. #4
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    davyboy30,

    There is much on such types of conversions here, in very good detail - it looks quite involved !! :

    https://airgunaccuracy.wordpress.com/

    Particularly here :

    https://airgunaccuracy.wordpress.com...-field-target/

    The rifle is a P70, but the principles remain the same.

    Have fun & a good Easter

    Best regards

    Russ

  5. #5
    gordon's Avatar
    gordon is offline it`s taken me 6 years to get so far...
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    I had an 800x that I had converted to sub 12ft lbs by Jon Harris , I wanted it for BR but it never quite got there .
    If I had my time over again ,I wouldn't spend a small fortune on conversion of a 6ft lb to 12 ft lb air rifle .
    That's just my experiance and opinion and there will be people who have had conversions done and are extremely happy with the gun .

    Gordon.
    ATB, Gordon.
    Professional Ferret Juggler

  6. #6
    RobinC's Avatar
    RobinC is offline Awesome Shooting Coach and Author.
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    Why?

    Why? its a superb 10 mt match rifle , designed for the purpose, there are loads of FT rifle about if you want one, use it or sell it as a 10 mt match rifle.

    PS, Incidentally some years back when the NSRA were considering allowing match air rifles to be used for 25 yd prone (shame it never happened!) my wife shot a standard Walther LG300 6 ft lb match rifle at 25 yd prone as an experiment to see how it compared at 25 yd with her .22rf, and shot similar scores to the .22 including a 99 ex 100. So why mess up the accuracy?

    Have Fun
    Robin
    Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?

  7. #7
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    FWB 800 Junior

    You’re right Robin,
    I will be using it for 20/25 yd Benchrest Competions.

  8. #8
    RobinC's Avatar
    RobinC is offline Awesome Shooting Coach and Author.
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    Accuracy

    Davy

    Leave it as it is, and concentrate on accurate aiming and a good stable hold, bumping up power will reduce accuracy and give no advantage in wind, certainly at 20/25yds. As it is, its well capable of shooting one hole groups at that distance, that is, as long as its pointed at the middle on each shot!

    I'm a precision match target shooter, and coach, with Air, Small bore and Full bore, I've only done bench to test, and I can assure you although its easy to get an "acceptable test" group, to get a top level bench group requires expert technique, no amount of power will compensate for poor technique!

    Only where the ballistic boundaries of the calibre are being stretched, i.e trying to shoot considerably further than the design of the calibre will it make any difference to up power, and then it will be a compromise, distance for accuracy, and my question would be the same, why?

    10 metre match rifles are "around" 550 fps because that is the optimum for accuracy with a pellet in the 8 gr bracket and the barrel twist is selected to give the optimum accuracy.

    As I said, a good shot can punch a one hole groups at 25 yds with the standard 6ft lb match rifles, as long as its pointed at the middle!

    I'll go back in my cave now,

    Have Fun
    Robin
    Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?

  9. #9
    xbow's Avatar
    xbow is offline "Right a bit, left a bit............"
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    I don’t know what the reg looks like on a 800 but I upped the power on my FWB P700 by increasing the air space in the reg body. I just made a new valve and reg body on my lathe. Early FT guns based on 10M guns were “converted” by drilling blind holes in the action to increase the air space. A bit crude but it worked.
    We can judge the heart of a man by his treatment of animals.
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    If I don’t reply to your comments it’s probably because you’re on my Ignore list.

  10. #10
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    Quote Originally Posted by davyboy30 View Post
    You’re right Robin,
    I will be using it for 20/25 yd Benchrest Competitions.
    The only advice I can give you Davy, is to listen to Robin. He sure knows his precision target shooting and I know nobody who is better informed on matters such as this. And I know his advice works.

    I've also been amazed at the accuracy of 6 ft lb target air rifles.

  11. #11
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    FWB800 Junior.

    Thank for your comments gentlemen, you’ve all been most helpful, especially you Robin. I had thought that increasing the power might have been a simple conversion, but it’s obviously far more complicated, and not a viable proposition so I’ll leave it as it is, and use it as Robin suggested.

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