Ruger American Rimfire Compact .22 WMR Satin Blue Rifle

A: No Lewis. The 17 caliber HMR is based off of the 'Necked Down" 22 Magnum case but the projectiles themselves are not to be fired from the same chamber. You will have to use a dedicated 22Mag or dedicated 17HMR barrel for each cartridge.

A: no they can not be used in the same gun you would need a different barrel Parent case .22 WRF Bullet diameter .224 in (5.7 mm) Neck diameter .242 in (6.1 mm) Base diameter .242 in (6.1 mm) Rim diameter .294 in (7.5 mm) Rim thickness .050 in (1.3 mm) Case length 1.055 in (26.8 mm) Overall length 1.350 in (34.3 mm) Rifling twist 1-16" Primer type Rimfire 17 HMR Parent case .22 WMR Bullet diameter .172 in (4.4 mm) Neck diameter .190 in (4.8 mm) Shoulder diameter .238 in (6.0 mm) Base diameter .238 in (6.0 mm) Rim diameter .286 in (7.3 mm) Case length 1.058 in (26.9 mm) Overall length 1.349 in (34.3 mm) Primer type Rimfire You could probably fire a 17 HMR in a 22WMR chamber but you may have split cases and there would be zero accuracy and serious safety considerations

A: Eve, No this barrel is not a pencil barrel. It is a tapered medium weight barrel.

A: Length of pull is 12.50" in the standard configuration, the insert in the back of the stock can be switched out with other longer options since it uses Ruger's Modular Stock System. https://www.ruger.com/products/americanRimfireCompact/specSheets/8323.html

A: George, this rifle has a 12.5 inch length of pull. It Includes two interchangeable compact length of pull stock modules that provide comb height options for scope or iron sight use. By simply removing the rear sling swivel stud, stock modules can be changed in seconds. Standard stock modules are available at ShopRuger.com.