It seems like you’ve provided information about Geco .308 Win 136gr Zero Lead Free Rifle Ammunition. This ammunition is designed to be highly effective and accurate, especially for hunting various types of game. Here are some key features:

1. Lead-Free Design: The bullets are lead-free, which can be important for environmental reasons and is often required in certain hunting areas.
2. Semi-Jacketed Bullet: The ammunition features a semi-jacketed bullet design. This means that part of the bullet is jacketed (covered in a metal casing), while other parts may be exposed.
3. Innovative Construction: The bullet has two tin cores, which is an innovative design. The front tin core is arranged radially with predetermined breaking points, ensuring a rapid response and high instantaneous effectiveness upon impact.
4. Hollow-Point Construction: The bullets have a hollow-point construction. Hollow-point bullets are designed to expand upon impact, creating a larger wound channel and increasing stopping power. This design is often preferred for hunting.
5. Front and Rear Tin Cores: The front tin core is designed for rapid response and high instantaneous effectiveness, while the rear tin core is constructed for stability in the residual body, ensuring a secure exit wound.

Overall, Geco .308 Win 136gr Zero Lead Free Rifle Ammunition appears to be designed for hunters looking for a lead-free option with features that enhance accuracy and effectiveness when taking down game. Always ensure that you comply with local laws and regulations regarding the use of specific types of ammunition for hunting.