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A challenge for HW45 owners!

Discussion in 'Anything Airgun Related' started by Dag, May 7, 2014.

  1. Dag

    Dag Pro Poster

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    Now here's a challenge for HW45 owners...... how to fit a Combro chronoscope without shooting it to bits!
    There are some really skillful and innovative peeps out there so I'm wondering what ideas you might come up with to get a Combro 625 safely mounted on the slab ended HW45. I've got one idea myself but will draw it up when I've checked dimensions etc. In the meantime has anyone succeeded already and can they post a pic or two? Alternatively get that grey matter working and see what you can design that will help others , well Me in particular as I get impatient waiting to check my gun on the club's F1 and have a Combro sittting indoors ;)
    Dag

     
  2. Tinbum

    Tinbum Delusions of adequacy

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    I used some DAS air dry clay and the bore alignment tool to mold an adapter.
     
  3. Dag

    Dag Pro Poster

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    Sounds good, can you post a pic of it on the gun?
    I'm thinking along the lines of using a scope mount with an extension rod attached to it. I started with seeing how the Combro bracket looked when fitted but the foresight stops the bracket sliding forward plus the alignment isn't quite right.
    Your idea sounds good though as the use of the dovetail stops having to take off the rubber bands when you re-cock the pistol each shot.
    Ta
    Dag
    View attachment 95645
     
    Last edited: May 7, 2014
  4. Dag

    Dag Pro Poster

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    Mind you, the underside of the HW presents some possibilities as I realised the angle on the underside subtend 90 degrees and could be used as shown below.
    However the rubber bands are still a problem.....for the mo' ..... as would be the muzzle striking the Combro when cocking,
    Dagctio

    View attachment 95646 or perhaps something along the lines of this? http://www.youtube.com/watch?v=esGLzXlS2FQ
     
    Last edited: May 7, 2014
  5. HWnut

    HWnut Busy Member

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    Yeah I have another challenge. How do I shoot that damn thing accurately at 10yards? I have the standard HW45 in .177 and my shots are all over the place on a standard air rifle target at 10 yards. Some shots land way to the left and other will land at the bottom almost missing the paper target... I'm really struggling with my self esteem right now. I could throw that thing in the trash bin.

    I've tried RWS Hobby pellets, H&N Field Target, H&N Sport, RWS Superdomes and a few others and the groups are bigger than my fist. I hit anything but the black area...
     
    Last edited: May 7, 2014
  6. Dag

    Dag Pro Poster

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    HWnut, you could:
    1.Practice,practice,practice
    2. Search this and other forums for guides to shooting pistols
    3. Start your own thread *
    Dag

    Seriously, two weeks ago I was missing a 7" target at 10m with half my shots. I'm learning to control my breathing and posture gradually and things are improving....slowly! Yesterday I was getting 25 shots out of 30 onto an A4 sheet at 40yds. My groupings at 10yds were about 3" ctc at half power but about 3" high and surprisingly a much tighter group ( c 2" ctc) on full power but at the aim point level.
    While my single handed stance is getting slightly better I get much better results with a very light two handed isosceles stance.
    * I would like to keep this thread open for comments re fixing a Combro though so would appreciate it not drifting off that subject
    atb
    Dag
     
    Last edited: May 8, 2014
  7. HWnut

    HWnut Busy Member

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    @Dag

    Thanks for the reply. Yes you are right. I only shoot rifles and holding a pistol is something different... Yesterday I tried different holds and pellets and techniques to steady the gun but all my inaccuracy boiled down to miserable trigger control which threw my muzzle off everytime I pulled the trigger. I read an Army manual about pistol shooting and they recommended dry firing in front of a bright wall to see if the sights move when pulling the trigger. And it sure was my problem. Bad trigger control.

    My groups are now tighter.

    Sorry for derailing your thread. Will not happen again.

    BTT!
     
  8. Dag

    Dag Pro Poster

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    Some progress today. I needed some dovetail clamps and Pipeman has loaned me an old scope from an Airsporter I think. Anyhow the clamps are removable and will fit the 13mm dovetail on the HW45.
    Yesterday Tinbum mentioned he had moulded something from air drying clay using an alignment tool. I immediately ordered a tool along with spare batteries for the Combro and they arrived in this morning's post. What service eh?!
    So, armed with clamps and alignment tool I have got as far as the photo below.
    Imagine a dowel in the clamps with a slot cut to take the lugs on the Combro and to ensure it stays centralto the muzzle.
    Any suggestions for improvements on this will be most welcome. The only drawback is that the Combro would have to be removed between shots. At the moment I haven't thought of any way round this and have yet to find and slot the dowel.
    Hope this is of interest to HW45 users
    Dag
    View attachment 95742
     
  9. Bruno27

    Bruno27 Engaging Member

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    I hold Combro and end of HW45 with my left hand (same position as photo from Dag) not too tight else get the "Bad" message, this may be due to recoil. Just think twice before pressing trigger as lack of concentration could end up in severe damage to the Combro (been there before!)
     
  10. Dag

    Dag Pro Poster

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    I succeeded in mounting the Combro to the HW45 although I'm not sure if I have mastered the effects of recoil on readings. The final setup involved two scope clamps , a small length of aluminium tube from a landing net handle, and a No.7 knitting needle.
    A slot was necessary in the tube to take the ridge and lugs of the Combro and to centralise it to the muzzle. The Combro alignment tool has a conical tip and because the muzzle is so recessed I didn't trust using that and preferred the knitting needle.
    View attachment 95801 View attachment 95802 View attachment 95803


    In the end although pretty well perfectly centralised I felt it safer to recheck the alignment between shots. It was easy to remove the Combro when cocking but just as easy to leave it on.
    As there were no rubber bands securing the Combro I held on to it when firing but noticed a considerable recoil as did Bruno I think. In fact when I next check it I will give his method a tryout as I may not have the scope mounts available then.
    I don't think this is the best solution but at least it enable me to get a Combro reading in addition to some I got using the club chrono.
    I have posted my chrono results in the thread "Taming the HW45".
    Dag
     
  11. Dag

    Dag Pro Poster

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    Sometimes the simplest methods are best! In the end I am getting good results just with a fair amount of Blue Tack surrounding the Combro and using the size 7 knitting needle to ensure alignment is ok.
    The ali tube trial wasn't that successful as there was slippage through recoil. The rubber bands didn't work as the gun has to be cocked and they had to pass round the gun in such a way that they had to be removed every time it was cocked.
    Although the picture here shows a fair sized wad of Blue Tack in fact I added some more both behind and at the front of the Combro.
    I checked alignment each time I cocked the gun but even at full power I couldn't see that the Combro had moved at all. I did press down on the V shaped section when firing as I am not going to risk the Combro by trusting Blue Tack alone.
    If anything readings are slightly higher than when using the ali tube but are comparable to those taken when using the F1 type chronoscope.
    Dag
    View attachment 96406
     
  12. Ichabod Armacost

    Ichabod Armacost Donator

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    OK................So how fast does a number 7 knitting needle go?:D
     
  13. darklord

    darklord Can’t beat a tx200 at 30m

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    bloody ell im glad i paid 40 quid more and bought a crony. got some of it back too after i sold my combro, combo great for rifles but a pain for pistols.
     
  14. Geordie

    Geordie Donator

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    Good stuff.
    I shot mine!!:rolleyes::eek::D
     
  15. 1961nuffield

    1961nuffield Honorary Member

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    It happens to most owners eventually!

    John
     
  16. sej016

    sej016 Donator

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  17. Meteor62

    Meteor62 Major Poster

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    Same as!
     

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