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Thread: Guess the inaccuracy issue BSA Mercury

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  1. 29-03-2022, 06:09 PM #1
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    TonyL
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    Quote Originally Posted by look no hands View Post
    Is it because its a BSA and not a HW.

    Pete
    You're getting the idea, Pete.
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  2. 29-03-2022, 06:13 PM #2
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    Alistair, it could be any of the reasons (or combinations thereof) as cited by the collective above. As well you will be aware.

    Nearly new? I guess you mean hardly used? A service may well help and I'd be taking a look at the buffer. Guessing you'll have fitted a new breech seal?
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  3. 29-03-2022, 07:08 PM #3
    RobF
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    .20 pellets?
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  4. 29-03-2022, 08:10 PM #4
    Captain Bongo
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    It's a trick question. There is no inaccuracy issue. 1 inch at 10 yards is pretty good for a Mercury.
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  5. 30-03-2022, 07:55 AM #5
    evert
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    Quote Originally Posted by Captain Bongo View Post
    It's a trick question. There is no inaccuracy issue. 1 inch at 10 yards is pretty good for a Mercury.
    Of course its a trick question!
    He claims that the barrel tension is correct, which is obviously a lie.
    How on earth could a Mercury barrel bolt have the correct tension, they come loose as fast as you cock the rifle a couple of times.
    Too many airguns!
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  6. 30-03-2022, 09:50 AM #6
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    Have you tried shooting it with your eyes open?
    Pete
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  7. 30-03-2022, 09:56 AM #7
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    Another vote for reverse choke.
    Good deals with these members
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  8. 30-03-2022, 03:54 PM #8
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    Quote Originally Posted by evert View Post
    Of course its a trick question!
    He claims that the barrel tension is correct, which is obviously a lie.
    How on earth could a Mercury barrel bolt have the correct tension, they come loose as fast as you cock the rifle a couple of times.
    Mine don't, so what did you do wrong

    Pete
    Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
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  9. 30-03-2022, 06:18 PM #9
    evert
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    Quote Originally Posted by look no hands View Post
    Mine don't, so what did you do wrong

    Pete
    Lots of shims under the nut and bolt head to get enough compression on the forks.
    Too many airguns!
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  10. 30-03-2022, 05:07 PM #10
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    Quote Originally Posted by Captain Bongo View Post
    It's a trick question. There is no inaccuracy issue. 1 inch at 10 yards is pretty good for a Mercury.
    Thats a bit strange tbh,I used to hit spent 12 bore cartridges using open sights
    over and over down the fields until I couldn't really see it anymore ,so quite a bit further than 10 yards lol.
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  11. 30-03-2022, 06:33 AM #11
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    Quote Originally Posted by TonyL View Post
    You're getting the idea, Pete.
    I'm glad you understand my sarcasm

    Pete
    Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
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  12. 30-03-2022, 10:06 AM #12
    bill57
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    I'm upset that I gave a serious reply now ....
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  13. 30-03-2022, 05:05 PM #13
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    Use 5.6 instead of 5.5 pellets.

    oops thought it was .22 ,my bad
    Last edited by jjjohn; 30-03-2022 at 05:34 PM.
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  14. 30-03-2022, 05:17 PM #14
    pbranthwaite
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    Quote Originally Posted by jjjohn View Post
    Use 5.6 instead of 5.5 pellets.

    oops though it was .22 ,my bad
    Wrong calibre but right track I think, BSA (and Webley) always had slightly different bore sizes to the european makers, try some ely wasp or similar pellets and things might improve
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  15. 30-03-2022, 06:18 PM #15
    evert
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    Quote Originally Posted by pbranthwaite View Post
    Wrong calibre but right track I think, BSA (and Webley) always had slightly different bore sizes to the european makers, try some ely wasp or similar pellets and things might improve
    My .177 meteors which are of the same period, perform very well with JSBs, so modern pellets are not the issue.
    However, modern Superdomes, which the OP used, are not always great in many guns.
    Too many airguns!
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