JSB Predator Polymag .20 Cal 5.1mm 13.89gr Pellets 150pk
The JSB Predator Polymag is a specialist hunting pellet designed for maximum effectiveness on small game and pest control. Manufactured in partnership with JSB’s US partner, who holds the patent on this two-part construction, each pellet combines a hollow-point lead body with a sharp polymer tip pressed into the hollow cavity. On impact the polymer tip drives inward, initiating rapid expansion of the lead skirt and transferring energy with greater efficiency than a conventional hollow point alone. The .20 calibre (5.1mm) variant weighs 13.89 grains and is supplied in tins of 150. JSB’s exacting manufacturing tolerances ensure consistent head diameter and weight across the tin, which translates to tight groups and predictable point-of-impact in the field. Well-suited to FAC and sub-12 ft.
Product Specifications
| Parameter | Value |
|---|---|
| Calibre | .20 (5.1mm) |
| Weight | 13.89 grains |
| Quantity | 150 pellets |
| Construction | Hollow-point lead body with polymer tip |
| Intended Use | Small game, pest control, FAC, sub-12 ft applications |
FAQ
What makes the polymer tip in the JSB Predator Polymag different from traditional hollow points?
The polymer tip is pressed into the hollow cavity of the lead body. On impact, it drives inward, triggering rapid expansion of the lead skirt and improving energy transfer compared to conventional hollow points.
Is this pellet suitable for use in all types of firearms?
This pellet is specifically designed for use in firearms with a .20 calibre chamber, such as those used for FAC and sub-12 ft applications. It is not recommended for use in firearms not designed for this caliber.
Are the pellets consistent in weight and diameter?
Yes, JSB’s exacting manufacturing tolerances ensure consistent head diameter and weight across the tin, contributing to tight groups and predictable point-of-impact.

Austin Young –
Used these pellets for small game hunting and found them very reliable. The expansion on impact is noticeable and the shots group tightly. Good for pest control in gardens too.
Jake Quinn –
The pellets perform well at short ranges. I noticed consistent results across multiple shots. The packaging is secure and the tin is easy to handle in the field.
Piers Wilson –
Excellent for targeting small animals. The polymer tip ensures better penetration and expansion. I’ve used them in both hunting and pest control scenarios with positive results.