Heavier than 18.1 Jsbs' in an original smooth twist?

Forums Pellets, Projectiles, Slugs, & Ammo Heavier than 18.1 Jsbs' in an original smooth twist?

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    BZapp7
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    Posted this and more on the yellow but I got no response. So here goes:

    I don't shoot my gen 1 .22 Royale for groups often anymore but when I do, on still days, it tends to show me my mistakes. On gusty days it's all over the place, sometimes moving the 18.1 Jsb 3x farther than a .25 shooting at 40 ft. lbs. I had a breezeless day recently, however, and I gave it a whirl at 50yds. I pulled one but got 8 of 9 shots at exactly 5/16." I must say this gun still got it! Even with discontentment rising in me because of the Crown, I like everything about it. It's  still a wonder gun, just like it was years ago.

    However since it is a tough shoot on windy days I have been condsidering getting a .25 for my main gun. But because of the emergence of Jsb's new pellets it has me thinking: all I need is to get my gun bucking wind as good as a 25.     Which brings me to the point of this post:  Has anyone had success with the .22 cal. 25.4 grain redesigned pellets in an original smooth twist barrel? I've tried these and the new 34 grains as well but only the 25.4 grains show promise. With the 25.4s I get 2/3rds of the pellets shooting 1 hole at 50yds humming at roughly 830 fps😕 Anyone have thoughts on what velocity may work?

     

    Also, what would it take to get my gun shooting optimal for these pellets? Obviously a sacrifice of shot count and reg. adjustments. But, new parts perhaps? Is this even possible?

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    douger
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    I shoot the 18 gr jsb also at 910 wonder what the 25gr would shoot fps  

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    mcoulter
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    I've shot them in my .22 Royale and they did  not perform well.  I can't find target photo now, but if I have time this weekend I will send a few down range for ya!  😉

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    Kitplanenut
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    I shoot the 18's in my wildcat. Great accuracy.  Tried the 25gr. Pretty bad. Went from 1/2 in @ 50 to 5 in. sylvan

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    BZapp7
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    So what is anyones best guess: will shooting the 25.4s at 870 potentially fix accuracy issues? My theory is that the harmonics may improve since the 18.1s are accurate at that velocity. Id have to mess with the reg though as I have the velocity screw maxed out. 

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    mcoulter
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    Here are 18s and the redesigned monsters at 50 yards.  12 shot groups.  The 25.4 grain monsters did better than I expected.

     

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    BZapp7
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    mcoulter

    Here are 18s and the redesigned monsters at 50 yards.  12 shot groups.  The 25.4 grain monsters did better than I expected.

     

    Ditto…I got almost exactly the same groups with the 25.4s. They show potential but I don't think I can deal with the 30% of shots that end up out of the one hole group. Do you think inaccuracy is caused by the deformed pellets or some other issue? I had the idea to shoot them sorted but that is probably impractical considering the amount of deformed skirts.

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    douger
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    what speed are you shooting the 25.4 at 

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    skorec
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     This Monster grouping is one of the best what I have saw yet.

     

    Also I am thinking that  it is typical grouping for extra long/heavy pellets shooting  with too slow twist rates ( 1-16” to 1:25” ) barrels which are designed   for standard pellets.  Low stability value cause some ( 10-30 % ) flyers.

     

    My  questions are if slow twist standard pellet barrels may stabilized them much better ( no flyers at all )  if they  have/use:

     

    1. more freely  bore  and  if yes why
    2. selected Monsters/Beasts/Piledrivers

     

     

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    BZapp7
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    douger

    what speed are you shooting the 25.4 at 

    My gun shoots the 18s at 870. From there the 25.4s shot at less than 750…I forget exactly what velocity

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    BZapp7
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    skorec

     

     This Monster grouping is one of the best what I have saw yet.

     

    Also I am thinking that  it is typical grouping for extra long/heavy pellets shooting  with too slow twist rates ( 1-16” to 1:25” ) barrels which are designed   for standard pellets.  Low stability value cause some ( 10-30 % ) flyers.

     

    My  questions are if slow twist standard pellet barrels may stabilized them much better ( no flyers at all )  if they  have/use:

     

    1. more freely  bore  and  if yes why
    2. selected Monsters/Beasts/Piledrivers

     

    Ok. I got exited after I saw the Red Wolf guys shooting them great. I guess they aren't for my Royale. ðŸ˜ž

    I  really need to find out what the bc is for them guys shooting the 25.4s with the expensive Red wolfs..maybe I should get one..lol

     

     

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