BSA R10 MK2 .177 heaviest pellet for accuracy over 50yds.

Forums PCP Airguns BSA R10 MK2 .177 heaviest pellet for accuracy over 50yds.

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    luke
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    My R10 shoots 10.65gr H&N domes at 920fps. Accuracy is superb up to 40 yds. but is inconsistent over 45+. Would a lower velocity tune help longer range accuracy? What is the heaviest pellet that will fit the magazine?

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    Salticon
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    My R10 is heavily modified at 16fpe, shoots 10gr JSB at around 860 fps, at 50 yards I can shot .5″ group with no wind, 75 yards 1.5-2″ groups.
    modded and tuned by Nick at Air Superoity.
    250 shots to fill :)

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    luke
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    Salticon, have you replaced the stock regulator?

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    Salticon
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    Yes, it hs a HUMA reg now

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    Smaug
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    OK, I’ll say it: .177 in general is just not very good past 50 yards. They bleed energy fast, and get blown around too much. Rather than try to make it do what it wasn’t designed to, just get yourself a .25 for those longer shots and bigger animals.

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    pinwheel87
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    How do you explain the .177 .1″ grouping video at 75 yds. ? Then again its just punching paper,but he changed his bbl.
     

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    iride
    Spectator
    Spectator

    wow apples to oranges , I came into the PCP sport on a 25 caliber wow, went to a 22 caliber, I shot 177 caliber s for 40 years just never in PCP world.
    I just want to take some sparrow shots in 177 that I would not take in 22 or 25 for safety reasons.
    So along comes a puncher bull Pup in 177 at a very good price , If its not shooting sparrow accuracy at 75 yards , Looks like Earnest will be putting a good barrel on it for me.
    I do think the 177 is a 75 yard caliper you just have to find the right pellet and maybe barrel.
    Oh, the 22 and 25 just buck the wind better , They do not shoot straighter.
    If there is no wind?
    Mike
     

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    Sam63
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    Luke I would try putting the pellets in by hand or with a single shot adapter at 50+ yards. Pellets that are slightly damaged start to lose accuracy at longer distances. If you have an LDC try 50 yds without it.

     Expect to lose accuracy with a 10.3 grain in windy conditions after 35 – 40 yards. I have found dropping the the fps to 850 – 860 keeps a 177 pellet more stable at longer distances when its windy. Some guns do not like slower speeds its trail and error.
     

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    luke
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    I have reduce velocity from 924fps to 898fps by reducing the hammer spring tension by 1.5 turns out. Accuracy has improved and so far is best with H&N 10.65 Barracudas.

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    iride
    Spectator
    Spectator

    Salticon
    Just reread the post,
    Did you say 250 shots per fill, Wow.
    I think I need a bottle gun,
    Mike
     

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