Geissele 7mm Straight Cut Rifle Barrel Blank 30-1313-2700-308-100-01-Z

Not every build needs a fancy contour dictating the outcome before the smith even picks up a reamer. The Geissele 7mm Straight Cut Rifle Barrel Blank 30-1313-2700-308-100-01-Z is built for exactly that — a precision unfinished barrel blank at 27.00 inches overall, cut in a straight profile, meant to give a gunsmith even, predictable steel to shape rather than a pre-taper telling them where the weight goes. This particular blank 7mm rifle builders reach for is chambered around 7mm (.284) and supplied unrifled and unthreaded, so the chamber, twist rate, muzzle threading, and crown all get cut to spec during finishing.

Because the rifling isn't cut at the factory, twist rate stays fully open until the finishing stage. A 1:8 finished twist tends to be the recommended sweet spot for 7mm — it balances stability across a wide range of bullet weights rather than locking a build into one narrow use case. Estimated pre-machining weight lands around 4.5 to 6.5 lb, though the final number shifts depending on how the barrel gets contoured and finished from there.

This barrel blank is built from premium USA steel, which matters more than it sounds like once a barrel is actually seeing hard use — heat, pressure, and repeated firing cycles all put real demands on the material. Whether the project is a precision hunting rifle, a tactical build, or a long-range setup chasing very specific performance numbers, this Geissele barrel blank gives a smith the raw foundation to hit exact specifications instead of settling for close enough.

Key Features

• Straight cut profile at 27.00 inches, built for 7mm (.284) rifle builds
• Unrifled and unthreaded — twist and threading set during finishing
• 1:8 finished twist typically recommended for balanced 7mm performance
• Estimated pre-machining weight of 4.5–6.5 lb, varies with final contouring
• Built from premium USA steel
• Suited for precision hunting, tactical, and long-range rifle projects