.17 Mach IV in a Cooper Rifle |
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| Warning! Notes: Accuracy at 100 yards; velocity measured 15 feet from an Oehler 35P. Remington 7 1/2 primers used throughout. Mach IV fired in Cooper rifle. Mach IV cases reformed LC .223. |
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Cartridge History
.17 Mach IV In A Cooper RifleThe .17 Mach IV In A Cooper Rifle Represents A Perfect Union Of Precision Cartridge And Precision Firearm. Cooper Firearms, Renowned For Their Craftsmanship And Accuracy, Have Long Been Associated With Varmint And Benchrest Shooting. Chambering The .17 Mach IV In One Of Their Bolt-Action Rifles Maximizes The Cartridge’s Potential, Delivering Sub-MOA Groups And Consistent Performance Across Varying Conditions. The .17 Mach IV Itself Is A Wildcat Round Developed From The .221 Remington Fireball, Necked Down To Accept A .172-Inch Bullet. Known For Muzzle Velocities Pushing 4,000 FPS, It Offers A Flat Trajectory And Minimal Recoil — Traits That Pair Exceptionally Well With Cooper’s Rigid Actions, Tight Tolerances, And Match-Grade Barrels. Shooters Using Cooper Rifles With This Cartridge Often Note The Seamless Feeding, Excellent Barrel Harmonics, And Easy Load Tuning. With Light 20-Grain Or 25-Grain Bullets, The Combination Is Deadly On Prairie Dogs, Ground Squirrels, And Similar Game Out To 300 Yards Or More. This Setup Appeals Particularly To Reloaders Who Appreciate Both Performance And Aesthetic — Cooper Rifles Are Not Only Accurate, But Beautifully Finished. Whether Used In The Field Or At The Bench, The .17 Mach IV In A Cooper Rifle Is A Testament To How Thoughtful Engineering And Handcrafted Firearms Can Elevate A Wildcat Cartridge Into A World-Class Tool. |
| Be Alert: Publisher cannot be responsible for errors in published load data. |
| Wt. | Bullet | Powder Manufacturer | Powder | Charge | Velocity (FPS) | |
| 20 | IMR | IMR-4198 | Subscribe | 4,130 | ||
| Remarks: accuracy (inches): .5 | ||||||
| 20 | Ramshot | X-Terminator | Subscribe | 4,151 | ||
| Remarks: accuracy (inches): .3 | ||||||
| 20 | Hodgdon | H-335 | Subscribe | 4,179 | ||
| Remarks: accuracy (inches): .25 | ||||||
| 20 | IMR | IMR-4759 | Subscribe | 2,472 | ||
| Remarks: accuracy (inches): .5-.75 | ||||||
| 25 | Hodgdon | H-335 | Subscribe | 3,827 | ||
| Remarks: accuracy (inches): .4 | ||||||
| 25 | Accurate | AAC-2230 | Subscribe | 3,810 | ||
| Remarks: accuracy (inches): .25 | ||||||
| 25 | Hodgdon | Varget | Subscribe | 3,824 | ||
| Remarks: | ||||||
| 25 | Ramshot | X-Terminator | Subscribe | 3,864 | ||
| Remarks: accuracy (inches): .4 | ||||||
| 25 | Hodgdon | H-335 | Subscribe | 3,827 | ||
| Remarks: | ||||||