FX PELLETS -VS- JSB MKII PELLETS What’s the difference?

[alejo]

Hi guys probably this topic has been discussed a few times between different brands of pellets , however what’s the difference between JSB MKII and the FX AIRGUN PELLETS? . The container is the same, ( except for the stickers), at first sight they look the same. 
JSB PELLET head size 6.35mm
skirt size 6.56mm ( circumference )
neck size 5.15mm
pellet size 8.90mm.
Inside skirt 1.65mm

FX PELLET. head size 6.35mm
skirt size 6.57mm
neck size 5.16mm
pellet size 8.90mm
inside skirt 1.63mm
I got all this dimension with my caliper ( Rex Beti IP54)

To me they are the same pellets, I would like to hear your opinion/ corrections, thanks be safe.

 

[Odoyle]

Only your gun shooting them will tell you what the differences are based on accuracy.

 

[dc8cappie]

https://www.youtube.com/watch?v=-AAQzSkRZVg

 

[Macdoc18]

the variation among the pellets in the same tin is just as wide as the variatio between brands. I would guss they use the same molds

 

[Smok3y]

I have tried the 18gr and 25gr 22 pellets head to head in the Red Wolf and they were close across several cans, but the differences could have been no different than just the batch differences. The FX seemed to like one speed down on the Helliboard just a bit better.

In 18gr, both were similar around 950 shooting great. The FX liked 880 a slight touch better but the JSB didn’t like that speed as much in this rifle. 

In 25.4, the JSB did the best of all my tests around 980 and was amazing. The FX had a few more fliers at that speed and liked 950 better and was extremely close, but the JSB at the higher speed just had a few less wayward shots. 

While I did shoot hundreds of pellets in those comparisons, it is just one rifle and a small sample in the grand scheme of real testing. i have happily been buying FX pellets while the JSBs have been harder to find and have been perfectly happy.