J4 Jackets, 7mm, 1.440" Long, (700)

J4 Precision Bullet Jackets - 7mm • 1.440″ • 700ct

Making your own match bullets and want jackets that don't hold you back? J4 Precision Jackets are the standard many custom makers lean on. They're straight, uniform, and concentric-exactly what you want when you're chasing tiny vertical and tiny groups.

Why builders choose J4

• Ultra-uniform walls: industry-leading concentricity with wall thickness tolerance around ±0.0003″ keeps cores centered and dispersion low.
• Consistent lots: tight process control means weight, length, and mouth geometry stay repeatable from box to box.
• Easy to work: clean draws and smooth surfaces form predictably in point-up dies, supporting very low TIR when your tooling is right.

Specs

• Caliber: 7mm (.284″)
• Length: 1.440″
• Quantity: 700 jackets
• Use: custom bullet making (varmint, target, hunting)

Shop notes

• Pair with quality cores and well-set dies to realize very low total indicated runout.
• Light oil or a proper lube helps maintain finish during forming.

Jackets only - not loaded ammunition and not complete bullets.