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Thread: 10m vs 6m rifle diopter sight dilemma

  1. #1
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    10m vs 6m rifle diopter sight dilemma

    I recently have dipped my toe into 10m rifle and luckily purchased a very nice Original 75 with the correct diopter sights.
    However, my indoor home range is 6m whereas I shoot 10m at the club and there is a significant sight elevation correction to make for the different ranges, which I would prefer not to have to make on a frequent basis.
    I haven't checked the velocity but it still punches nice clean holes at 10m so guess it's fine. Interestingly I don't make any change to sights for my pistol and chaps at the club don't when swapping from 10m to 20m even.
    Other than buying another diopter sight to enable one to be set for each range, are there any other easy fixes people have come up with?
    If not, does anyone have a cheap sight going which is similar to my Diana?
    Regards
    Andy
    Steyr Evo 10, Walther LP400, Original 75, Weihrauch HW45 Blackstar & HW40, BSA Scorpion SE

  2. #2
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    JMHO : I think that the problem that you are experiencing is to be expected and related to the difference in height between Bore Sight and visual Sight Line. On a Pistol this difference is typically much less than that for a rifle and the Muzzle Elevation difference accounts for the effects noted when shooting at Targets with varying ranges with each class of "Weapon".

    One way to avoid making adjustments to the Rear Sight is to have two different height Foresights or maybe even using a Sight Raising Block under the Foresight at the longer ranges. By "scaling" you can calculate the amount of Fore Sight lift needed by measuring both the difference in impact points for the 6 and 10mtre shot targets (with no Rear Sight adjustment between shots) and the distance between Front and Rearsight. If you needed a Sight Raising Block that was a non standard height they can be made by someone on that well known Auction Site for a reasonable price. However, I seem to remember that Original offered two different Fore Sight heights and Sight Raising Blocks, made with the intention of switching as appropriate for each range with minimal Rear Sight adjustment required.

    HTH,

    Vic Thompson
    Last edited by Vic Thompson; 22-06-2018 at 05:00 PM.

  3. #3
    Join Date
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    Buy a second rifle
    For practice, you can easily use the 10m settings. As focus for 10m shooting is on consistancy. Placement of the shots can be easily adjusted with the sights.
    So it doesnt really matter where the groups end up.
    I use this type of practice shooting for almost all my matchgun shooting. I focus on groups/consistancy, not on where they end up.
    This way, I never have to alter my sights.
    Another way is, aiming off. Find out how far yr off and make a second bull/aimingpoint o yr target
    ATB,
    yana

  4. #4
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    another way is to shoot through two targets at once with an offset between them that corresponds to the difference in impact points at 6 and 10 mtre ranges. The front "target" could be just a photocopied "aiming mark" with a guideline on it corresponding to the required offset. By doing this the rearmost target would be the "scoring one" but the holes might be a bit fuzzier than shooting through one card only (just realised already suggested by previous poster).

    Vic Thompson.

  5. #5
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    Andy,

    It depends whether you are competing at 6 yards, or practising.

    If you are practising, then do not shoot for score at 6 yards - just concentrate on small round groups and clean shooting cycle.

    Have fun & a good weekend

    Best regards

    Russ

  6. #6
    Join Date
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    Quote Originally Posted by PhatMan View Post
    Andy,

    It depends whether you are competing at 6 yards, or practising.

    If you are practising, then do not shoot for score at 6 yards - just concentrate on small round groups and clean shooting cycle.

    Have fun & a good weekend

    Best regards

    Russ
    Good advice, but when I used to shoot my '75 in NARPA 6 yard competitions and NSRA 10 meter competitions I bought a spare rear sight and had one set for 6 yard use and one set for 10 meter use - it saved me hours of messing about and setting up every time I changed disciplines!

    I sold my spare '75 dioptre on here some time back to someone who had the same needs!
    Rossendale Model Target Club every Tuesday and Thursday evening 7 - 10pm.

  7. #7
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    Oct 2016
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    Thanks for the tips and advice so far chaps. I totally agree it doesn't matter what you are aiming at / actually hitting so long as it sa small group that gets smaller (hopefully!). But it's not that motivating compared to aiming at a target and hitting it .
    Whilst I like the idea of a foresight raiser, it might be as easy to look for another rear sight.
    Shame about Zooma! That would have been perfect.
    I'm sure one will pop up.
    Enjoy the sunny weekend all
    Andy
    Steyr Evo 10, Walther LP400, Original 75, Weihrauch HW45 Blackstar & HW40, BSA Scorpion SE

  8. #8
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    Quote Originally Posted by Lundy View Post
    Thanks for the tips and advice so far chaps. I totally agree it doesn't matter what you are aiming at / actually hitting so long as it sa small group that gets smaller (hopefully!). But it's not that motivating compared to aiming at a target and hitting it .
    Whilst I like the idea of a foresight raiser, it might be as easy to look for another rear sight.
    Shame about Zooma! That would have been perfect.
    I'm sure one will pop up.
    Enjoy the sunny weekend all
    Andy
    A foresight riser is not possible for a Model 75 as it has a one piece cast foresight assembly/housing that fits around the barrel, but the '75 HV came with a higher optional front casting as well as the standard height type. Both came with every new rifle.

    Your only "good" option for "dual distance" shooting is a spare rear dioptre, but it does not have to be from a Model 76 as the other Original dioptre sights will fit and work just as well and there are a lot more of them about so you should have more chance of finding one.

    I may even have one - I will take a look and let you know if I can find it.
    Last edited by zooma; 23-06-2018 at 07:29 PM.
    Rossendale Model Target Club every Tuesday and Thursday evening 7 - 10pm.

  9. #9
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    Zooma that would be great. I've checked the "Auction" site and there is a 75 set but it's missing the clamp wheel and bar. Fingers crossed you find something
    Andy
    Steyr Evo 10, Walther LP400, Original 75, Weihrauch HW45 Blackstar & HW40, BSA Scorpion SE

  10. #10
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    Bingo!

    It turns out that I still have my spare HW75 rear sight assembly!

    It is the Model 75 type, complete, and ready to mount on your rifle.

    When I used them both I put a very small spot of the wife's nail varnish on one of them so I could easily identify the one that was set at 6 yards from the one that was set at 10 meters.

    This one has the small (very small) nail varnish spot on it, and although the nail varnish may not be to your colour choice, it is a good idea and can be easily wiped off if not required - or if you prefer a different colour shade

    I will take a picture of it and send it to you later today
    Last edited by zooma; 24-06-2018 at 02:42 PM.
    Rossendale Model Target Club every Tuesday and Thursday evening 7 - 10pm.

  11. #11
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    Zooma, that's an amazing price of luck! Look forward to the pics.
    Steyr Evo 10, Walther LP400, Original 75, Weihrauch HW45 Blackstar & HW40, BSA Scorpion SE

  12. #12
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    Pictures sent to you by email yesterday (Sunday evening).
    Rossendale Model Target Club every Tuesday and Thursday evening 7 - 10pm.

  13. #13
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    I posted the sight to you this morning by 1st class "signed for" so it should be with you in the morning
    Rossendale Model Target Club every Tuesday and Thursday evening 7 - 10pm.

  14. #14
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    Bob
    Sight arrived today and in perfect condition.
    Many thanks indeed, I'm very pleased to have a matching pair of sights at a fair price.
    Andy
    Steyr Evo 10, Walther LP400, Original 75, Weihrauch HW45 Blackstar & HW40, BSA Scorpion SE

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