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Thread: BAM B51 minimum power 60 shots string

  1. #1
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    Default BAM B51 minimum power 60 shots string

    with minimum power setting and 135bar fill, 60shots fired still going strong...

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  2. #2
    Marksman
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    looks excellent!!
    what calibre and what pellets?
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  3. #3
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    .177 jsb 8.4gr... with more fine adjustment.. it should do the FT job good...
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  4. #4
    Marksman
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    yeahh..I did my BAM up to 760-780fps and it was good for over 100 shots...very consistent.
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  5. #5
    Sharp Shooter
    Doctor BAM

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    Fanie
    That's the BAM B-51 clearly enjoying its new lease on life here in Somerset West......!!!
    Thanks boondock for the help setting it up and further fine-tuning can be done once we have fired some 1000 shots through the barrell..... Everything is kept stock standard and I expect the port to be 2.7mm, just the striker screw adjusted in to minimum striker length.... Grouping is easily kept into a ragged 10mm hole at 15m and once the rifle has settled, I might want to up the power to 12 ft.pound.... We use the rifle now with slightly lighter pellets to get the speed up to about 780 to 800 ft/sec.
    As a lot of people on the forum already know, BAM's rule big time and it is still the most affordable, forgiving, adjustable, accurate, rifle out there for the cost-conscious shooter..... Need I say more.....????
    Thanks once again Fanie for your speedy service and I shall report the progress of th BAM's life on this forum....

    Malan :claphead :crazy :claphead :crazy
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  6. #6
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    I am starting to think I might be better off using my BAM instead of the CZ for FT..........

    Yes, Fanie rocks! Resonable price, good advice and friendly service.
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  7. #7
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    according to the user of that bam.. it has fired 150shots in total from 135bar down to 95bar.. very consistent..
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  8. #8
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    I've just received 3 different port sizes from Warrick. (Thanks Warrick).
    1.7; 2.0 and 2.5 mm. My standard port size in my BAM 51 was 3.5 mm.
    First I popped the 2.5 mm port in without adjusting the striker, but without a crony it is hard to tell but, it felt not much different, so after a few shots, I popped the 1.7 mm port in, again without adjusting the striker. The POI went down by about 2.5 cm but with the lack of very good pellets itís hard to say whether there is an increase of accuracy. Iím not interested in power as such or to get it ready for FT, but would like to get the BAM as accurate as possible. Before changing the port it was very consistent at 20 m with a grouping of 15 mm and less with good pellets.
    Is it possible to do better? The CZ 200 that I got a few weeks ago does -10 mm at 20 meters.
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  9. #9
    MOT: Thomson Pneumatic Rifles

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    Hi Swannie,
    The BAM's are accurate out the box as a rule (possible just setting trigger let off), below are some group sizes I have in my range book from my own rifle and others I have set up and or tuned.
    Center to center 3.59mm 3shots (8.09mm outer edge) +-950fps Crosman Premier ultramag @ 20m.

    C to C 3.12mm 3shots (7.62 edge to edge) +-950fps Ultramag @ 30m

    C to C 2.81mm 5shot group @ 20m Ultramag +-1000fps, untuned BAM, scoped and zeroed for customer.

    C to C 5.4mm 5shot Accupell @20 +-1060fps, rifle as above.

    C to C 2.31mm 3shots @ 30m FT tuned BAM (JSB/ UltaTec universal) +-790fps 195bar fill)

    C to C 2.35 3shots @ 40m, rifle and pellets as above.

    C to C 10.57mm 5shots two diff shooters @35m (4shots in 6.27mm C/C), rifle "Supermag/Ultamag tune" with Ultramag pellets av1055fps.

    Your BAM can do much better (but is usually down to the jerk behind the trigger, ha ha), judging by the groups above (and bearing in mind that conventional wisdom states that Diabalo pellets are not stable above 900fps) and that I am not the best shot arround I am sure the BAM's are capable of better accuracy!!

    BAM's rule!!
    ps: allthough I would still like an AA 410FAC, but value for money and keeping the Minister of Finance happy the BAm still can't be beat!!!
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  10. #10
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    well.. my bam.20 already beat my steyr hi power .177 and talon.20 at 100m accuracy... it's a keeper...
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  11. #11
    Sharp Shooter

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    Warrick I do believe that if you want to test the potential of a rifle you need a 10 shot group. Anything less is meaningless.
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  12. #12
    Sharp Shooter
    Doctor BAM

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    Swannie
    I read your comments about changing the port size of the BAM, but you must realise that it is extremely important to fire the shots over a chrony, or at least have a measureable way of establishing if you are optimising the air consumption.... Alan's way of adjusting the striker screw to minimum impact works on the so-called "sweet-spot" way of optimisation..... The rifle we set to just about 700ft/sec with JSB's is 9.2ft.pound Energy level, which is perfect for the first 1000 or so shots out of a new rifle.... We will up the Energy in time, but at that consumption, you will then get 150 shots per 135bar fill.... I re-filled the rifle myself and the one-way valve opened at 95bar.... The added advantage is that in stead of some 20-odd fills per SCUBA tank at 180bar, you can fill at least 50 times at that lower 135bar threshold.....!!!! Not that air is the most expensive part, but you can keep on firing away where other rifles need the extra pressure to operate..... My earlier posts indicated that we would like to get it up to 12ft.pound levels, but hopefully we can keep the max. operating pressure to below 150bar..... Accuracy is no problem, and I will personally test the rifle at a later stage, simply because it must still wear in and settle before you can get consistency.....

    Malan 8)
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  13. #13
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    I have made 3 mm groups @ 45m with my BAM with Baracuda Match 10.65 gr pellets and 25 - 38 mm groups @ 100 m with the same pellets.

    The BAM for its price is the best.
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  14. #14
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    All 3 shot groups. My best 10 shot group @ 45 m is 14 mm
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  15. #15
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    Ok this is what happened since receiving the ports from Warrick.
    I fitted the 2.0 mm port and replaced the striker with a slightly longer one to make the distance even shorter. I adjusted the length until I didnít have valve lock (pumped to 140 bar) then I counted out pellets in 20 pellets /batch and started shooting.
    Batch 81-100 showed a drop in POI of about 10 mm over 15 meters.
    When I pumped it again it was at 30 bar.
    100 Shot are more than adequate for me. Now I just need a better scope.
    :sleepgo
    Next time I go to Newcastle I'll take it to the gunsmith there and have it tested on his crony. When I got it out of the box it was shooting 1010 fps with Pro Hunters. 980 with RWS Geco's and 910 with TS-10's.
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