Bowler Ratings

PatternStTwCr
Oily:X.XX.XX.X
Medium:X.XX.XX.X
Dry:X.XX.XX.X
Sport:X.XX.XX.X

Bowler ratings are from 1 to 10 in order of Stroker (ST), Tweener (TW), Cranker (CR)

Note: Ratings are only available to our premium members.

General Info

Brand:
Name:Hazmat Pearl
Reviewed:May 2025
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Coverstock Specs
Name:HK22 - Semtex Pearl
Type:Reactive Pearl
Box Finish:500 / 1000 / 1500 SiaAir / Factory Compound
Color:Blue / White / Cobalt
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Core Specs
Name:Hazmat
Type:Symmetrical
RG:2.479
Diff:0.055
Int. Diff:0.000

For details on our standard test layouts, please click here.

The Hammer Hazmat Pearl introduces a pearlized coverstock to the symmetrical Hazmat core. This is the third version of the Hazmat, with the original being a hybrid and the follow-up being a sanded solid. With both previous Hazmat balls now discontinued, the nameplate lives on with this release. This ball uses the HK22-based version of the Semtex Pearl coverstock that was previously seen on the Scorpion Strike. It is finished with 1500 SiaAir and Factory Compound, giving it plenty of length before its very strong turn at the breakpoint. This pearl coverstock makes the Hazmat Pearl the most responsive ball in the Hazmat line so far. Bowlers who like a very strong motion off the dry will really appreciate what this ball offers.

Stroker

Stroker had a very good reaction on the medium oil pattern with the Hazmat Pearl out of the box. He found its downlane motion to be very strong. He needed to move his feet farther left on the fresh compared to where he lined up with the Anger, Scorpion Strike, and Arctic Vibe. Seeing the big recovery at the back end freed up his swing and let him strike frequently on this condition. In addition to all the hook he had when he got the ball going to the right, the glossy finish gave him enough length on shots pulled inside of target to hold the line and stay in the pocket. As more shots went down the lane, he continued to move left with his laydown point, but he still saw the ball recover to the pocket and go through the pins very strongly with the box finish. He could shell-down into an Anger or Arctic Vibe if he wanted to stay straighter up the lane, or he could

Additional Hammer Hazmat Pearl Resources

Click here to visit Hammer's website to read the manufacturer-supplied information on this ball. Also, see below for the manufacturer-produced promotional video for this ball.

Please remember that our reviews are solely based on our own testing and that you may sometimes find differences between our comments and ratings and the manufacturer's claims. Links to these manufacturer resources are provided here strictly for convenience purposes.

The BTM Ball Testing Team

About The BTM Ball Testing Team

Bowling This Month's ball testing team is led by Eric Martinez. Our team of three testers has reviewed well over 1,000 bowling balls for Bowling This Month. In addition to leading BTM's ball testing efforts, Eric owns and operates University Pro Shop in San Antonio, TX, and he is an avid competitive bowler. Learn more about our bowling ball testing and review process here.