They’re the same like two 150 pound men are the same; as in they are very similar but there are differences.

I recently bought two tins of the FX 18.1 pellets to compare against the JSBs and It was my experience that with my rifles they did not perform nearly as well. Notably so. But I wouldn’t say that they were bad, they just didn’t work for me.

And honestly, if I were shooting offhand instead of off a rest, I’d probably never notice the difference. 

Try some, they might work brilliantly for you.
 
FX 25.39gr on the left, JSB 25.39gr on the right. Heads are a bit different, but can't see anything else to really separate them other than the labels on the tins.

fx-jsb 25-39gr.1615945732.jpg
 
 
FWIW, I just switched to FX pellets in my Dreamline.25 and Huntsman Regal XL .22 due to availability. They shoot just as accurate in these two guns. Slightly higher poi but very tight groups. I’ve had good results with AA pellets in a couple of other guns. Also two guns I only shoot JSB. They’re certainly worth trying in your gun. May be a perfect match. 
 
They’re the same like two 150 pound men are the same; as in they are very similar but there are differences.

I recently bought two tins of the FX 18.1 pellets to compare against the JSBs and It was my experience that with my rifles they did not perform nearly as well. Notably so. But I wouldn’t say that they were bad, they just didn’t work for me.

And honestly, if I were shooting offhand instead of off a rest, I’d probably never notice the difference. 

Try some, they might work brilliantly for you.

More than they're the same like two 150 pound men are the same, these JSB made rebranded pellets are more like identical twins. They are very much a like but with subtle differences. Made at the same factory even. With that said. I can buy 2 tins of JSB pellets that are labeled JSB (should be exactly the same) but I have found differences. Each lot could have slight differences.

What I'd like to know; are .25 - 33.95gr pellets labeled EDgun or FX, original King Heavies or MK2? 👦
 
They’re the same like two 150 pound men are the same; as in they are very similar but there are differences.

I recently bought two tins of the FX 18.1 pellets to compare against the JSBs and It was my experience that with my rifles they did not perform nearly as well. Notably so. But I wouldn’t say that they were bad, they just didn’t work for me.

And honestly, if I were shooting offhand instead of off a rest, I’d probably never notice the difference. 

Try some, they might work brilliantly for you.

More than they're the same like two 150 pound men are the same, these JSB made rebranded pellets are more like identical twins. They are very much a like but with subtle differences. Made at the same factory even. With that said. I can buy 2 tins of JSB pellets that are labeled JSB (should be exactly the same) but I have found differences. Each lot could have slight differences.

What I'd like to know; are .25 - 33.95gr pellets labeled EDgun or FX, original King Heavies or MK2? 👦


I've tried to the best of my ability with magnifying glass and dial drive micrometer, and although LOGIC would tell you that FX .25 Heavy are Mk2, since FX designed their .25 HP guns around that pellet, I think the FX .25 Heavy are King Heavy (Mk1). I have the JSB Mk1 and Mk2, and the FX Heavy, and the Mk1 JSB and FX Heavy are IDENTICAL in all respects. Head size, shape, skirt thickness, cavity depth, all identical. The Mk2 have a slightly shallower cavity and thicker skirt. My Delta Wolf likes the Mk1 better than the Mk2 and shoots the FX Heavy exactly the same as the Mk1. 

To note, the FX brand pellets seems to come in better condition than the JSB branded ones, less head dings, less bent skirts, and overall shinier and appear to be lightly lubed. The .22 RD Monster FX brand shoots better in my Red Wolf HP (Bleu) than any other pellet...

PS., who the hell weighs only 150 pounds??? ;)
 
They’re the same like two 150 pound men are the same; as in they are very similar but there are differences.

I recently bought two tins of the FX 18.1 pellets to compare against the JSBs and It was my experience that with my rifles they did not perform nearly as well. Notably so. But I wouldn’t say that they were bad, they just didn’t work for me.

And honestly, if I were shooting offhand instead of off a rest, I’d probably never notice the difference. 

Try some, they might work brilliantly for you.

More than they're the same like two 150 pound men are the same, these JSB made rebranded pellets are more like identical twins. They are very much a like but with subtle differences. Made at the same factory even. With that said. I can buy 2 tins of JSB pellets that are labeled JSB (should be exactly the same) but I have found differences. Each lot could have slight differences.

What I'd like to know; are .25 - 33.95gr pellets labeled EDgun or FX, original King Heavies or MK2? 👦


I've tried to the best of my ability with magnifying glass and dial drive micrometer, and although LOGIC would tell you that FX .25 Heavy are Mk2, since FX designed their .25 HP guns around that pellet, I think the FX .25 Heavy are King Heavy (Mk1). I have the JSB Mk1 and Mk2, and the FX Heavy, and the Mk1 JSB and FX Heavy are IDENTICAL in all respects. Head size, shape, skirt thickness, cavity depth, all identical. The Mk2 have a slightly shallower cavity and thicker skirt. My Delta Wolf likes the Mk1 better than the Mk2 and shoots the FX Heavy exactly the same as the Mk1. 

To note, the FX brand pellets seems to come in better condition than the JSB branded ones, less head dings, less bent skirts, and overall shinier and appear to be lightly lubed. The .22 RD Monster FX brand shoots better in my Red Wolf HP (Bleu) than any other pellet...

PS., who the hell weighs only 150 pounds??? ;)

Mike, i did in the 5th grade! :) but to your comment on the 22 fx hvy 25 grn vs the JSB, yes they do shoot different for me also, the 600mm superior liner i tested greatly preferred them? but the 700mm didn't like them as much? so who knows? let me say this, I have had multiple tins of jsb's over the years that are different lots, same label. that have been noticeably different to the naked eye? usually skirt thickness or depth, so i quit looking as long as they shoot good, i wonder if any 2 dies are the same that were intended to be, right? in my line of work, they defiantly are not, but i don't make pellets :) 
 
@Jayson, opinions asked, opinions given. Don't think anyone here claims to be the ultimate authority. That being said, based upon my experience & measurements the .30, 44.75gr. JSB, FX & Hatsan Vortex pellets are exactly the same. Took an educated guess that the 18.1's might be the same also.


Actually the OP wasn't asking for an "opinion", he was asking for an answer to his question. And pretty sure Jayson was referencing this.......

https://www.airgunnation.com/topic/pellets-2/#post-956866
 
@Jayson, opinions asked, opinions given. Don't think anyone here claims to be the ultimate authority. That being said, based upon my experience & measurements the .30, 44.75gr. JSB, FX & Hatsan Vortex pellets are exactly the same. Took an educated guess that the 18.1's might be the same also.


Actually the OP wasn't asking for an "opinion", he was asking for an answer to his question. And pretty sure Jayson was referencing this.......

https://www.airgunnation.com/topic/pellets-2/#post-956866

Well, to be constructive. It's not a cut and dry answer. As stated in previous posts, manufacturers have JSB make them pellets using their specific dimensions in dies. So they may look identical they may not perform the same. Much as die 10 does not shoot the same or as accurate as die 16 pellets from JSB or other manufacturers. When I find a particular die and lot number that works well I will buy a few sleeves of the same lot. It's all trial and error until the next batch comes out that work as well or better. Dies wear as they make pellets and it is ever changing. Chasing the combination for your barrel is never ending if you are searching for optimum accuracy.

Dave