After Slug Tuning my .25 FX Crown, Lo and Behold the Accuracy!

Hello AirgunNation Peoples,



Spring weather finally co-operated, blessed with a beautiful and sunny weekend to try out my slug tuned FX Crown .25!


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With the handful of various power and barrel upgrades, all geared towards using NSA slugs (33.5g). Maxed, she’ll give me 70 FT/LBS.


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My Crown .25 definitely has the umph, but does it have the accuracy? Saturday morning had almost perfect conditions in regards to the weather for putting slugs on paper at 60 yards. So good indeed that I chose to double that distance to 120 yards. Beyond 100 yards is not the norm for me, but “Hey, why not?” ,try longer groups since slugs are made to go the distance.



The remnants of this thread will be a photo descriptive write-up of how the 60 and 120 yard group shooting experience went.



First thing was to set up the range/targets at 60 yards. Going to be using 8” shoot-n-see’s on some dura-seal swing targets.



60 yards 

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The left target will be the designated sighter and the right target will be the final five-shot groups.



So, I set up to shoot.



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Unfortunately, there were two moments I goofed on the shooting session. Here is the first instance.. Well, I was so excited to move the targets out to 120 yards I just ripped off the 60 yard five-shot groups and forgot to take a close up photo of the groups. Oops! (1x) Best I can do to illustrate the groups is zoom in on the scope-view after completing the 5 five-shot groups. 


Here it is:


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We’re talking 3/4” to 1.5” groups @ 60 yards. I’m not perfect. This may not be record breaking or even as good as you think it could be, but for my use it’s plenty good enough.



Now, it’s time for some fun because I have never shot my .25 Crown this far on paper before. It’s probably a joke distance for some of you pro-shooters out there in airgun-land, but for me, it is a challenge. I don’t own any fancy wind meters or gps ballistic range calculators to help me out. Just good old country boy ingenuity.



120 yards



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Walked out to take a look.





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Remember the left target was a dedicated sighter and the right target was the final ten-shot group. Here it is by itself.



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Okay, here is the second time I goofed for the session. The low shot was my mistake, the holdover for 120 yards with the Crown .25 is 4 mils high and for the low landing shot I mistakenly held 3 mils high. Oops! (2x)



Brought the targets in to analyze and measure.





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The first five shots just slightly a half-inch group. Then, two things happened 1) I got cocky, and 2) the wind died off some. It was a pretty consistent 8 MPH right to left then it lessened to about 5 MPH.



So, the real center-to-center measured 2.32 inches shown in the photo below.



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There was about three years of tinkering and tuning my FX Crown .25 to obtain decent slug accuracy. I was tickled that it even grouped like this. I’m not ready for house sparrows at this distance but for a novice I am happy with how the gun is performing.







Thanks,



JK
















 
Nice work, sir.






Joe, nice tune, slug shooting, explanations and photos! Slugs are definitely much harder to size and tune a PCP for than pellets by a wide margin! Your 3 years of hard effort has paid off! Also, your Multi Media skills of editing/pasting photos and video is impressive as well as photography/video angles!





Thanks to both you guys! It was a great morning of airgun shooting, so I wanted to share the story.



JK




 
No mods here... I’m afraid to touch my tune! I’m looking at just purchasing another rifle for slugs. My tune works too perfectly for both 18gr and 25gr pellets that I don’t want to screw it up.

I only spent one day trying out slugs with my current tune and nothing but Hybrids were doing anything exceptional. So I need to find some more slugs to try or buy another rifle. But I will not be touching the tune!

And thanks for the details on your mods and sharing your experience. I always enjoy your posts.
 
No mods here... I’m afraid to touch my tune! I’m looking at just purchasing another rifle for slugs. My tune works too perfectly for both 18gr and 25gr pellets that I don’t want to screw it up.

I only spent one day trying out slugs with my current tune and nothing but Hybrids were doing anything exceptional. So I need to find some more slugs to try or buy another rifle. But I will not be touching the tune!

And thanks for the details on your mods and sharing your experience. I always enjoy your posts.


Modding and tuning is a hobby. A want, not a need for my .25 FX CRWN. You are correct , when it’s right.. Why touch it??


But.



She tunes down externally with the HS and TF to factory pellet tune speeds also.



HS # 2 & TFP .25/.30

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Definitely a oldie but goodie!! Love’n my Crown .25!





JK




I too love my Crown(s). However the best I’ve ever done with slugs was this group at 100 yards, using .22 FX Hybrids

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Now that I have a .30 Crown MK2 I’ve got to get it to the range and try it at 100 yards. The most I am set up do at home is 50 yards. At that range I’m getting about 1 MOA.

Chris
 
Definitely a oldie but goodie!! Love’n my Crown .25!





JK




I too love my Crown(s). However the best I’ve ever done with slugs was this group at 100 yards, using .22 FX Hybrids

37BFEB45-FFAF-4849-89C6-825148450410.1622640883.jpeg


Now that I have a .30 Crown MK2 I’ve got to get it to the range and try it at 100 yards. The most I am set up do at home is 50 yards. At that range I’m getting about 1 MOA.

Chris



Still plenty accurate enough for a kill, very nice Chris!





JKool




 
Joe you shooting slugs out of a none slug liner? that's pretty good!


If you researched STX Superior liners a bit you’re going to uncover and discover that the main deference between the Standard and Heavy STX Superior liners is twist rate.. A little slower(standard) a little faster(heavy). Both shoot slugs, but the Standard STX SUPERIOR is like a hybrid pellet barrel & slug barrel. The Heavy Superior STX barrel is geared more-so toward heavier slugs because of that faster twist for a slugs shape or design. Gyroscopic stability, know what I’m saying bro?? 


Great question Darkcharisma! 🤜🏽🤛🏽





JoeKool