Quick Answer
Both .243 and .270 are suitable calibers for whitetail hunting, but .243 is generally considered more marginal due to its relatively lower kinetic energy and bullet weight. .270's flatter trajectory and larger case capacity offer an advantage in longer shots and windier conditions. However, .243 can still be effective with proper shot placement and bullet selection.
Caliber Comparison
When comparing the two calibers, consider that .243 Winchester typically has a 100-yard muzzle velocity of around 2,900-3,000 fps (feet per second), while .270 Winchester ranges from 3,000 to 3,200 fps. This 10-20% difference in velocity translates to varying kinetic energies: .243 produces around 1,300-1,400 ft-lbs (foot-pounds), whereas .270 generates 1,500-1,700 ft-lbs.
Bullet Selection and Shot Placement
For both calibers, choose bullets with optimal weights and constructions for whitetail hunting. In .243, 90-100 grain bullets like the Hornady V-Max or the Nosler Ballistic Tip are popular choices. For .270, 130-140 grain bullets like the Winchester Power Point or the Federal Premium offer better penetration and larger wound channels. Regardless of caliper choice, aim for a clean, high-shoulder shot to ensure a quick and humane harvest.
Hunting Strategy and Terrain
When hunting in open, rolling terrain, both calibers can perform well. However, consider that .243 may require more precise shot placement and a closer range due to its relatively lower energy and bullet weight. In contrast, .270 can tolerate longer shots and more wind drift. When hunting in dense cover or at longer ranges, consult ballistic charts and adjust your aim accordingly to compensate for drop and windage.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.