.22 RD Monster's Instability Issues

Forums Pellets, Projectiles, & Ammo .22 RD Monster's Instability Issues

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    kthomas
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    Shooting these at 10m and they produce a 1 hole group, but when I take these pellets to 120+ yards they fly so unpredictably and inconsistently. This is at ~875 fps out of a Taipan Veteran Long. The 18 grain JSB's seem to fly much better at distance.

    Anyone else have these issues?

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    Strever
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    every one seems to be saying they fly best at 930+

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    kthomas
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    The Taipan Veteran I guess doesn't have the horsepower to utilize them, which is a shame. Thankfully the 18 grain JSB's do well out to 200 yards.

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    Franklink
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    Just out of curiosity, what's the max fpe you can get out of the Veteran Long? I have the Short and it'll do 32 fpe with 18.1s and 34fpe with some 20gr pellets that I cast. That is with the hammer tension adjust absolutely maxed out to the point that the lever wont catch if I go in any further. It also sounds horribly inefficient at that power with the short barrel-I can HEAR the wasted air. I was thinking the longer barrel would be getting quite a bit more than my short, just didn't know how much. 

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    pmg
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       Yeah same results here. Thought I was onto something great till I got to 50yds and the groups started opening up some. Like yours mine prefers the 18gr. JSB. I’ve not tried the HN 21gr but plan on it soon. It checks all the boxes for what I bought it for and I’m extremely pleased with it. Had some fun shooting a small spinner against some rimfire guys Sunday at a 100m, it was a hoot for me. Our range is in meters for some reason.

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    reprobate
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    just yesterday i was weighing the RD pellets and found tremendous variation in weight…. from 24.6 to 25.71. so maybe if you try and sort, the results would improve.

    thats what i shall try n do this weekend

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    jwrabbit123
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    I am getting 38fpe out of a taipan std with stock reg settings , I am sure with cranking reg and enlarging ports to see 45fpe no problem , but mine is a tack driver ith pellets and slugs so I am leaving it at 34fpe , I would Imagine the long should do min 10% more

    LOU

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    Spray1Mark
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    kthomas

    The Taipan Veteran I guess doesn't have the horsepower to utilize them, which is a shame. Thankfully the 18 grain JSB's do well out to 200 yards.

    200? WOW! how are the groups?

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    zx10wall
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    The .22 Taipan Vet Long will shoot the RD Monsters up to 940 fps after a power tune. I settled for mine to shoot the 25.39 pellet at 900 fps for 40 shots from a 250 bar fill. It did so with precision and was accurate out to 100 yards. 

    • This reply was modified 2 months ago by zx10wall.
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    davidsng
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    Yes, you need them shooting fast to keep them stable with regular twist rates.  Most guns don't have the power requirements without tuning.

    • This reply was modified 2 months ago by davidsng.
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    kthomas
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    Franklink

    Just out of curiosity, what's the max fpe you can get out of the Veteran Long? I have the Short and it'll do 32 fpe with 18.1s and 34fpe with some 20gr pellets that I cast. That is with the hammer tension adjust absolutely maxed out to the point that the lever wont catch if I go in any further. It also sounds horribly inefficient at that power with the short barrel-I can HEAR the wasted air. I was thinking the longer barrel would be getting quite a bit more than my short, just didn't know how much. 

    The Veteran Long does up to ~1010 fps with 18 grain pellets, which is about 40-41 fpe. That's with hammer spring tension maxed. I leave it at about 930 fps for the 18 grainers. 

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    kthomas
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    Spray1Mark

    kthomas

    The Taipan Veteran I guess doesn't have the horsepower to utilize them, which is a shame. Thankfully the 18 grain JSB's do well out to 200 yards.

    200? WOW! how are the groups?

    I don't shoot for groups at 200 yards, I shoot steel targets. This is my one setup at 200 yards:

     

    It's approximately 2" wide by 5" tall. With little to no wind it's very easy to hit with the Taipan, but becomes much more challenging once any wind picks up.

    I've been impressed with how predictably the 18 grain pellets fly out to 200 yards. I setup steel targets at 250 and 273 yards, but did myself a disservice by placing them in an area where they are partially covered by foliage, and it's damn near impossible to spot misses. I will have to relocate them today, to an unfortunately shorter distance. Was really hoping to see how they would do out to almost 300 yards.

    • This reply was modified 2 months ago by kthomas.
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    kthomas
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    IMO I think it's a design flaw for a pellet to be stable at a specific velocity.

    If I get a power tune to get the RD monsters to shoot well at 100 yards – where will they fall apart next? 150 yards? 175 yards? 200 yards? 

    Hard to justify these new RD monsters if at some point they become unstable. Great for shooters that shoot at known and set distances of say 100 yards, but for those looking for a high BC projectile to poke at the distance limits of these airguns – the RD monsters are not it.

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    Spray1Mark
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    I've been impressed with how predictably the 18 grain pellets fly out to 200 yards. I setup steel targets at 250 and 273 yards, but did myself a disservice by placing them in an area where they are partially covered by foliage, and it's damn near impossible to spot misses. I will have to relocate them today, to an unfortunately shorter distance. Was really hoping to see how they would do out to almost 300 yards.

     

    Very interesting, what velocity are you pushing the 18g JSB at if I may ask? my RW std gets them to 880FPS.

    I was considering having my RW std converted to HP by Daystate just to shoot the 25g Monsters (I have loads of them) my std put them out at about 750FPS, way too slow I think.

    Also how much holdover do you need at 200yds?

    • This reply was modified 2 months ago by Spray1Mark.
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    chasdicapua
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    I have had similar results with the .177 16 gr beasts. Very good at 25m but like a shot gun at 50 yards. My sub 20fpe bench rest rifle just doesn't have enough muzzle velocity to keep them stable when they get out to 50 yards and slow way down. 

    Chas

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    kthomas
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    Spray1Mark

    I've been impressed with how predictably the 18 grain pellets fly out to 200 yards. I setup steel targets at 250 and 273 yards, but did myself a disservice by placing them in an area where they are partially covered by foliage, and it's damn near impossible to spot misses. I will have to relocate them today, to an unfortunately shorter distance. Was really hoping to see how they would do out to almost 300 yards.

     

    Very interesting, what velocity are you pushing the 18g JSB at if I may ask? my RW std gets them to 880FPS.

    I was considering having my RW std converted to HP by Daystate just to shoot the 25g Monsters (I have loads of them) my std put them out at about 750FPS, way too slow I think.

    Also how much holdover do you need at 200yds?

    I'm shooting the 18 grain JSB's at 930 fps. My scope is zeroed at 10m, and I have to dial the full range of elevation available in my scope (10 mils) and holdover an additional 0.5 mils for 200 yards.

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    zx10wall
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    kthomas

    IMO I think it's a design flaw for a pellet to be stable at a specific velocity.

    If I get a power tune to get the RD monsters to shoot well at 100 yards – where will they fall apart next? 150 yards? 175 yards? 200 yards? 

    Hard to justify these new RD monsters if at some point they become unstable. Great for shooters that shoot at known and set distances of say 100 yards, but for those looking for a high BC projectile to poke at the distance limits of these airguns – the RD monsters are not it.

    You certainly don’t have to shoot them. Maybe your barrel doesn’t like them. I also tuned a few Crickets to shoot them. They shoot them great at 880 fps and have the same twist rate ~ 1:17.7” as your barrel. 

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    kthomas
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    zx10wall

    kthomas

    IMO I think it's a design flaw for a pellet to be stable at a specific velocity.

    If I get a power tune to get the RD monsters to shoot well at 100 yards – where will they fall apart next? 150 yards? 175 yards? 200 yards? 

    Hard to justify these new RD monsters if at some point they become unstable. Great for shooters that shoot at known and set distances of say 100 yards, but for those looking for a high BC projectile to poke at the distance limits of these airguns – the RD monsters are not it.

    You certainly don’t have to shoot them. Maybe your barrel doesn’t like them. I also tuned a few Crickets to shoot them. They shoot them great at 880 fps and have the same twist rate ~ 1:17.7” as your barrel. 

    Interesting. Maybe it is a barrel thing.

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    JeffDodge
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    I’ve had the same problem in my Kral.  I can’t get them to group as good as the 18’s past 50.   I’m currently shooting them at about 910fps maybe a little less (chrony only picked up 3 out 24 shots bc of lighting issues in the woods.  I’ve had trouble pushing my gun past 930 with these but like others have mentioned, it becomes too inefficient at that point anyways.  

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    zx10wall
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    I have a .22 R3 EdGun Long that loves the RD Monsters. Shoots them at 925 fps. This gun incouraged me to sell my .22 Red Wolf HP because I was slightly more accurate at 75 & 100 yard with this Eddy. The EdGun has a LW 1:16 twist.

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