The Nosler 35643 Partition bullets deliver exceptional performance for 25 caliber rifles, combining deep penetration with controlled expansion through Nosler's proven dual-core design. These 120-grain spitzer bullets maintain their structural integrity across a wide range of velocities and impact scenarios.
What Makes This Different
The Partition's unique dual-core construction features a solid rear section and expanding front core separated by an integral partition wall. This design ensures 60-70% weight retention while creating a mushroomed front section for maximum energy transfer. Unlike standard cup-and-core bullets that may fragment or fail to expand consistently, the Partition maintains predictable performance from 1,800 to 3,200 fps impact velocities.
Key Features
- Dual-core construction with integral partition for controlled expansion and deep penetration
- 120-grain weight optimized for 25-06 Remington, 257 Roberts, and 257 Weatherby Magnum
- Spitzer profile with 0.257" diameter for flat trajectory and wind resistance
- Tapered jacket thickness from nose to partition for progressive expansion
- Solid rear core maintains momentum for complete pass-through on medium game
- Hand-inspected for dimensional consistency and quality control
- 50-count box provides sufficient quantity for load development and hunting seasons
Field testing demonstrates consistent 1.5-2 MOA accuracy in quality rifles with proper load development. The 120-grain weight handles crosswinds effectively while maintaining energy at extended ranges. Hunters report reliable performance on deer, antelope, and similar-sized game from 100 to 400 yards. The partition design prevents jacket separation that can occur with high-velocity impacts on bone or heavy muscle.
Technical Specs
- Caliber: .257" (25 caliber)
- Weight: 120 grains
- Profile: Spitzer boat-tail
- Construction: Dual-core with integral partition
- Jacket Material: Gilding metal
- Core Material: Lead alloy front, solid rear
- Ballistic Coefficient: Approximately 0.458 (G1)
- Recommended Twist Rate: 1:10" or faster
- Quantity: 50 bullets per box
- Manufacturer: Nosler, Inc. (USA)
The Nosler Partition remains the benchmark for controlled-expansion hunting bullets after decades of proven field performance. Handloaders seeking consistent accuracy and terminal performance choose these bullets for their most important hunts.