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JSB Diabolo Exact King Heavy .25 Cal, 33.95 gr - 300 ct

JSB Diabolo Exact King Heavy .25 Cal, 33.95 gr - 300 ct

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  • Code: 546398-350 · 0.25 cal · 33.95 gr · 300 ct
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The new heavy weight when it comes to .25 JSB pellets, weighing in at 33.95 grains. The JSB King Heavy .25 caliber pellet was developed dueto the request of many airgunners with higher power PCP airguns looking for a little heavier pellet. The skirts on these are rather large so if you're having trouble with your gun loading them, pick up the King Heavy MKII instead.

JSB Diabolo Exact King Heavy Features
  • .25 caliber
  • 33.95 grains
  • Domed
  • 300 pellets

Warning: Important information for California residents
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  • ManufacturerJSB
  • Caliber0.25 cal
  • Ammo Typepellets
  • Ammo Weight33.95 gr
  • Pellet ShapeDomed
  • Pellet Quantity300
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JSB Diabolo Exact King Heavy .25 Cal, 33.95 gr - 300 ct
27 Reviews
96% (26)
0% (0)
4% (1)
0% (0)
0% (0)
100% Recommend this product (27 of 27 responses)
By Eddie
Airforce Condor 25 caliber
June 27, 2019
1inch groups at 100 yards with Airforce condor 25cal
By Verdell
Clayton, DE
JSB Diabolo Exact King Heavy .25 Cal, 33.95 gr
June 4, 2019
These are some good heavy grain pellets that shoot good out of my Hatsan AirMax. They are accurate and carry a big punch when they hit something.
ProsNice size, accurate, easy to load and deadly
Best UsesHunting and pesting
By GareBear
Best in my Hatsan AT-44
May 14, 2019
These heavy rascals fly straight and hit where you aim the barrel. My first choice for accuracy in my AT44 and BT65...
Proslittle effect from wind ...very accurate.
Best Usesactually priced for target shooting but hunting would be where they belong.
I don't need to test anymore!
April 22, 2019
I was a little skeptical about using these in my Patriot Kodiak Springer but no more. Not only are they accurate, I shot a grey squirrel at 25-30 yards and the pellet penetrated both shoulders! The squirrel never knew what hit it. I thought these heavier pellets were just for PCP's but not anymore. I've found my hunting pellet.
ProsAccurate Hit hard
Best UsesHunting small game
By dean
February 8, 2019
Shoot well out of my 25 cal mrod.
Best Useshunting small to med game
By Wesley
All I shoot
January 20, 2019
This is the best consistent pellet you can buy
By Tim
, texas
December 15, 2018
Flys straight
Best UsesYes
By Brian
I love them
December 6, 2018
Love these pellets I shoot them out of my marauder and have a friend that shoots them out of his marauder. They are very consistent pellets. Probably the best ive used so far
ProsConsistent and no defects
Best UsesHunting
By Jeff
Geneva, AL
The Best pellet.. Period.
November 26, 2018
My AirForce Condor SS loves these things.
The most accurate pellet I have found at 100 yards.
Predictable at 200 yards. I can shoot 4 inch targets at 200 yards with considerable holdover. The weight keeps them consistent.
The production process keeps them accurate.
The past 2 years I have gone through about 3000 of these and I haven't yet gotten a deformed, or bad pellet.
ProsPerfection in a pellet.
ConsWish I could buy them in a tin larger than 350 count.
By Joe
Chicago, Illinois
Can't Get the Accuracy I'm Looking For
November 17, 2017
The regular .25 JSB Exact Kings were giving me 10 shot 3/4" groups at 50 yards (1000 FPS) without even trying, so I figured bigger must be better right? Apparently not so with my Airforce Condor SS. Anywhere north of 900 FPS, 10 shots spread out to at least 1 1/2 to 2 1/2 inch groups. I can do a little better if I slow them down to around 860 FPS, but by that time the foot pounds are the same as the 25.39 grain King going 1000 FPS, which I can't miss with. I would really like to know why my gun doesn't like these, because at around 940 FPS they hit really hard. I may try the MKII's in case the difference in the skirt size makes some kind of difference in the aerodynamics. I noted another reviewer with a Condor SS loves them at higher velocity, so maybe its just me or my gun?
ProsHigh quality item. Good value.
ConsMy gun doesn't like them.
By Stan
jsb .25 heavy
November 7, 2017
I have only shot these on paper so far, but they shot very well out of my marauder. Half inch groups at 40yrds. I shot these and the mk11 heavies and they both shot about the same out of my gun. Also the 25 gr. jsb's shoot just as well, maybe just a tad better.
Prosaccurate, consistent, super quality
By Patrick
Lenore, ID
one round split a chunk of 4x4
October 19, 2017
Packaged well, flawless pack of three hundred rounds...turkeys beware, and or any other large bird that may stray too near...
ProsHeavyweight contender when you're needing the knockdown to get things done...
ConsExpensive for plinking, but three tins make a freebie...
By Dimitri
Sahuarita, AZ.
One of the best Pellet
October 12, 2017
You can use this Pellet with number of a deferent guns and get the best results.
By Charlie
San Luis Obispo, California
Great pellets 👍
October 6, 2017
These are heavy pellets30 + grains. These are my favorite pellets for my Benjiman Armada.and my Hatsan Bullboss. They hit Hawaii d and have great penetration. I would highly recommend them for any high powered airgun Ÿ‘Ÿ‘
ProsVery even quality and configuration !
ConsNone 😎
By Jesse
Del Rio, TX
Love these pellets
June 24, 2017
My Benjamin Armada loves these pellets. I am getting consistent one hole groups at 50 yards. Be very careful with the slip on lid on the tin. They can get stuck and you can easily spill pellets everywhere.
Prosaccuracy, consistency,
ConsNo screw on lid on the tin
By Carl
JSB are the only thing I'll put in my FX Impact
June 8, 2017
The most deadly accurate pellets you can buy for the Impact.
ConsWish the tin was easier to use. A screw on lid would be a great idea.
By Thomas
Bay Shore, NY
JSB Diablo Exact King Heavy .25 cal 33.95 gr Pellet
May 13, 2017
These pellets are big and heavy. Very Accurate in my Condor SS in .25 cal. What else can I say besides ...I love them. On power setting 5.5 they shoot about 935 fps and are very accurate.
ProsAccurate. Clean and no deformed pellets found in the tin. Accurate!!
ConsMake a screw on lid for the tin.
By Juan C.
very accurate
March 31, 2017
used this on my hatsan bull boss was hiting hole in hole at 35 yds...went to 50 yds and hit quarter size groupings very good pellet and very accurate...
Prosvery good and heavy good knock down power...
By James
Santa Fe, NM
Super accurate.
February 14, 2017
This pellet consistantly shoots sub 1/2" 11 shot groups with my FX Royal 500, full power, at 50 yards, 1" groups at 100 yards. Don't use bent skirts. Truly a one hole group pellet.
ProsBest accuracy in my FX Royal 500.
ConsA few bent skirts. Fiddly tin.
By Rick
North Carolina
May be my new "go to" pellet !
January 17, 2017
Groups just as well, if not better than the 25 grain kings but with a little more whack!!!
By Charles
Great heavy pellet
January 8, 2017
Hits like a hammer.
ProsWeight retention, expansion
By Eric V.
Albany NY
Chessy but "Best Bang for Your Buck"
September 7, 2016
Purchased my my BENJAMIN NITRO 2 35 CAL IN FEB and quickly fell in love with it .
ProsThis Ammo is highly accurate as well as consistently consistent. Target or huntint this ammo stands out as as winner high knock down force ,heavy penetration power ,do i need say more
ConsIf yhere is any i havent found them ,tho i would like to see a hunting pointed pellet produced by JSB with this grain weight or heavier
By wll2506
My Condors Love These !
June 21, 2016
My Condors send these out in the 950-975 fps area and they are smashers, Very accurate at 70 yds and that the stated speed they are giving me ~70fpe at the muzzle - about 47fpe at 70 yds and 40 fpe at 100 yds.

These pellets turn a powerful PCP into a real powerful PCP ....... I'm looking to take this combo and go after ~70+ lb hogs this year.
ProsIn my Condors, everything is good ... they are accurate and hit like sledge hammers !
ConsNothing, except I wish the tin was a screw on lid.
By terry
Hundred, wv
My EscapeUL loves these pellets.
February 2, 2016
I just got these pellets in the mail this morning and it only took a couple shots to zero in at 27 yards like i do with the jsb kings 25.39 pellets and these heavy pellets are giving me tighter groups. These are the best performing pellets that i have tried in my airforce EscapeUL. I will be buying a few more tins of these pellets soon. I like them more than the lighter 25.39 kings. I would recommend anyone that has an airforce escape to try these pellets.
ProsAll pellets in the tin are usable and no show damage. My gun loves them.
By Extreme 4.
Odessa, Tx
September 11, 2015
Great pellet, my Will Piatt tuned long gun and carbine Sumaras love these pellets. Mrod gen 2 loves them also, no trouble feeding thru the mag. Well made just like all JSB products
ProsClean and uniformed
By morris w.
memphis tennessee
great new pellet in .25 cal. is here at last!
June 25, 2015
good price in the 300 count tin. very accurate and good weight for hunting and long range target shooting.
Prosevery thing about this pellet is great.
By carlos
edinburg, TX
June 5, 2015
I have a 257 condor and this pellets are awesome I was grupin less than one inch at 120 yards average fps 1210 and that is because I have a extrim valve and heavy hammer
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