JSB Diabolo Exact, .177 Reviews

J S B pellets are top tier . They are often used when testing for accuracy in air gun reviews for good reason. I purchased the 10+ grain because the JSB 7.3 grain broke the sound Barrier and made a loud crack when used With my RWS 52 magnum springer. I found The heavier pellet to be a good choice in this rifle. I also recommend trying H&N as well. I own 12 air guns and these two brands are my favorites .

They are on the expensive side but worth the price .

These pellets allowed me to see just how accurate my Gamo Swarm Magnum Gen3 really was. I bought these and several H&N pellets in the 9 to 10 grain weight class to try, as my gun seemed to prefer that weight. My first two shots with these were flyers, and almost made me skip over them. After cycling through the different options, I said what the heck and loaded up another clip with these. I am glad I did. I proceeded to punch a 0.5" hole in the target with six pellets at 45 yards. I narrowed my choices down to this pellet and the H&N barracuda extreme. The Diablos outperformed the barracudas in a few side by side comparisons. I zeroed in with the JSB Diablo and out 6 shots in less than a 1 inch group at 45 yards, with four of the six in the same hole. The barracuda extreme was precise as well, but had flyers more often. Honorable mentions include the H&N barracuda match, the Sig Dagger, and the Gamo red fire. The red fires are accurate as well, but break the sound barrier.

As others have mentioned, JSB should use screw on lids. One mistake and you will be out of an expensive tin of pellets.

If you are looking for the most precise and accurate pellet for your Gamo Magnum, give these a try.

These are my go to for all my .177 guns. They seem to shoot best for me around the 850-900fps range

Not a thing

most all ready know they are the best

Excellent value and accurate.

Great pellet for magnum springers. Excellent consistency. No defects.

Price

After trying countless other pellets, these performed consistently with a Hatsan 95 in .177. Even similar weight pellets. Fit the breech very well

Consistent, great weight for avenger with stock tune, and very accurate at least to 60 yards(limit of initial testing). 7 GR pellets varieties were transonic, but the weight of these was perfect to bring velocity into the high 900s fps. Also shot well out of impact mark 2 with 177. 700mm barrel kit with fast twist rifling.

Nothing

They do great in most of my air rifles

But they do really bad in some other air rifles I have because they are not the same size as most 4.52 pellets, they run small.

It seems all of the Exact .177 pellets I have tried will not shoot in my HW97, to small. They just drop in. Lots of flyers. On the other hand, the H&N Baracudas are perfect for the HW97K. The copper and the lead 4.52 are the same size and shoot superb. I surprised more people have not spoken up about their size difference compared to most 4.52 size pellets. They do shoot good in my HW35 and Benjamin 397 but not the HW97. Might just be that rifle. So beware, they do run small for a 4.52. size pellet.

Awesome pellet for my marauder. Very consistent groups

Very consistent ammo, shoots great groups out of my gun.

Less $$$ for shipping, doubles the cost of the ammo.

Like all air guns, ammo shoots better out of some guns than others. You have to search sometimes find which ones work best for your air gun. I was very pleased to find and try this particular brand and weight pellet, worked perfectly right from the beginning. I will say this, ammo from JSB seems to be "cleaner" then other brands and more consistent. Nice work!

Jsb pellets are the best. I have a umarex gauntlet and its very accurate with these

Nothing

One of the highest BC in the .177cal. Pellet produces nice groups at hi and low speeds and near and far distances

Nothing

For a heavy. 177cal it seems to interact well with all12 groove barrels I've tried.

Work well in my Mrod.

Nothing.

These shoot really well for a heavy pellet

These pellets are accurate and consistent enough.

The price is too high in my country.

When I shoot rats, they did not died instantly. They fleed and died somewhere. I don't understand what is happened. Some other pellets did well on rats.

Accurate shooting pellet.

Nothing.

Shoot the same as JSB 8.44 just a heavier pellet.

These are perhaps the most reliable pellets I shoot out of my Gamo Shadow Sport with a Ntro Piston Power Plant. I can get nickel size groups at 40 yards when I am on. These pellets are heavy enough to pierce the skull of a tied wild hog at point blank range rendering him useless.

So far, these have proved out to be my best shooting pellet with my new Avenger 17 cal PCP rifle. I have tried about 8 different pellets in weight and shape and these so far are the best. What worked really well in another rifle does not with the Avenger. Since I am new to PCP, I don't yet know how to make all the adjustments that can be done with the PCP type rifle. I did find that I lowered the regulator pressure to 800 psi and the trigger air pressure type adjustment to minimum and that made shooting the lighter pellets much more accurate and consistent. So, with my limited knowledge with a PCP rifle these pellets proved quite accurate and consistent.

Don't know how the pellets are made, so can't suggest how to make them better. Cost wise, for the little more money I feel they are better than those that are a dollar or two less, per tin.

Very consistent pellet

Shoots very well in gauntlet air rifle

This pellet works in two of my guns

Everything been a JSB fan for a long while.

Absolutely nothing

If you know how to tune a gun properly this will be you results.