The .20 Nosler is a varmint cartridge that Nosler had SAAMI cartridge and chamber drawings accepted for back in 2017, alongside the released .22 Nosler, but it was never officially announced by the company. It is built on the same rebated-rim, 6.8 Remington SPC–derived case as the .22 Nosler, designed for the AR-15 bolt face. Crucially, it is not simply a necked-down .22 Nosler — the base-to-shoulder length is stretched by almost 0.100", giving it 2–2.5 grains more case capacity and preventing cross-chambering. As of recent years it remains unreleased, so no factory brass exists, though Nosler has published load data for it.
Suitable Powders
Bullet Weight (gr) -> | 0-50 | 50-75 | 75-100 | 100-150 | 150-200 | 200-300 | >300 |
|---|---|---|---|---|---|---|---|
👍 ... suitable powder
👍👍 ... suitable AND popular powder among our reloading community (clasification might evolve as more community members share their loads )
Caliber Specifications
Standard / Datasheet
Primer Size
Small Rifle (SR)
Case Capacity
39 Grains of Water
Bullet / Barrel Diameter
0.204'' | 5.18 mm
Max. Case Length
1.85'' | 46.99 mm
Max. Cartridge Length
2.26'' | 57.4 mm
Max. Standardized Pressure:
55114 psi | 3800 bar
XXL ID
CID_101
.20 Nosler load data is available with the following bullets:
(most popular first)
