The main difference between the 45/70 and the 350 legend is their intended platform and raw kinetic power. The 45/70 is a massive 19th century cartridge built for lever action rifles to deliver bone crushing energy on the largest North American game, while the 350 legend is a modern, low recoil intermediate cartridge designed specifically for the AR-15 platform to harvest deer in states with straight wall cartridge regulations.
45/70 vs 350 legend Comparison Table
To accurately compare these two straight walled hunting cartridges, we must examine their physical dimensions, pressure limits, and baseline ballistic performance. The data below represents standard premium factory loads. For the 45/70, we reference modern high pressure loads like the 325 grain Hornady LEVERevolution. For the 350 legend, we reference the 150 grain Winchester Deer Season XP.
| Specification | 45/70 | 350 legend |
| Cartridge Type | Centerfire Rifle | Intermediate Rifle |
| Parent Case | None (Original Design, 1873) | .223 Remington (Heavily modified) |
| Bullet Diameter | .458 inches (11.6 mm) | .357 inches (9.1 mm) |
| Case Length | 2.105 inches | 1.710 inches |
| Overall Length | 2.550 inches | 2.260 inches |
| Typical Bullet Weights | 300 grains to 430 grains | 150 grains to 180 grains |
| Muzzle Velocity (20 inch bbl) | 2,050 fps (325gr FTX) | 2,325 fps (150gr XP) |
| Muzzle Energy (20 inch bbl) | 3,032 foot pounds | 1,800 foot pounds |
| Maximum Pressure | 28,000 CUP (Antique) to 40,000 CUP (Modern) | 55,000 psi (SAAMI) |
| Effective Range | 200 to 250 yards | 200 to 250 yards |
| Trajectory | Arced | Arced |
| Bullet Drop (200 yds) | Approximately 10.5 inches | Approximately 7.5 inches |
| Wind Drift | Moderate to High | High |
| Recoil | Severe (Approx. 35 foot pounds) | Very Mild (Approx. 8.5 foot pounds) |
| Barrel Length Performance | Excels in 18 to 22 inch barrels | Excels in 16 to 20 inch barrels |
| Suppressor Performance | Good (Subsonic loads available) | Good (Subsonic loads available) |
| Short Barrel Performance | Massive muzzle blast | Excellent powder burn |
| Accuracy | High | High |
| Penetration | Extreme (Deep penetration on massive game) | Moderate (Perfect for deer) |
| Expansion | Devastating | Reliable |
| Hunting Performance | Elite (Grizzly, Moose, Elk, Bison) | Excellent (Whitetail deer, feral hogs) |
| Home Defense | Not Recommended (Over penetration risk) | Good (In AR-15 platforms) |
| Tactical Use | Historical Military Standard (1873) | None |
| AR-15 Compatibility | No (Case is too long and rimmed) | Yes (Native to the platform) |
| Magazine Compatibility | Tubular Magazines | Standard AR-15 profile magazines |
| Ammunition Cost | Very High | Low to Moderate |
| Ammo Availability | Good | Excellent |
| Best Uses | Dangerous game defense, heavy timber hunting | Low recoil deer hunting, AR-15 brush guns |
Understanding the Engineering
The technical differences between these cartridges span nearly 150 years of firearms development.
The 45/70 was adopted by the United States military in 1873. It was originally loaded with 70 grains of black powder pushing a 405 grain lead bullet. It requires a massive, elongated case with a thick rim. Today, standard 45/70 ammunition is loaded to safe pressures of 28,000 CUP to protect antique Trapdoor Springfield rifles. However, ammunition manufacturers produce high pressure loads specifically tailored for strong modern lever action rifles like the Marlin 1895. These modern loads push the ballistic capabilities of the 45/70 to extraordinary levels.
The 350 legend was introduced by Winchester in 2019. Several Midwestern states implemented laws restricting deer hunting to straight walled cartridges only. Winchester recognized the need for a modern, low recoil straight walled cartridge that could fit into a standard AR-15 magazine. They designed the 350 legend to share the same rim diameter as the 5.56 NATO cartridge, allowing it to function in standard AR-15 rifles with only a barrel and magazine swap.
Velocity Comparison
Velocity dictates the trajectory flatness and the reliable expansion of modern hollow point bullets.
When looking at premium hunting ammunition, the smaller 350 legend is generally the faster cartridge. The 350 legend pushes a lightweight 150 grain bullet at roughly 2,325 feet per second from a 20 inch barrel.
The 45/70 must push a bullet that is over twice as heavy. Despite its massive powder capacity, the modern 325 grain Hornady load leaves the barrel at a slightly slower 2,050 feet per second.
Muzzle Energy Comparison
Muzzle energy measures the absolute kinetic force transferred to a target upon impact. This is the primary metric for destroying heavy bone and anchoring massive animals.
The 45/70 completely eclipses the 350 legend in raw power. By generating over 3,000 foot pounds of energy with standard modern hunting loads, the 45/70 operates in an entirely different weight class.
The 350 legend generates roughly 1,800 foot pounds of energy. While this is absolutely perfect for harvesting whitetail deer at 150 yards, it simply cannot match the sheer kinetic output of a dedicated big bore rifle cartridge.
Trajectory Comparison
A flat trajectory minimizes the margin of error when estimating range for a hunter in the field.
Both of these cartridges suffer from steep trajectories when compared to modern bottleneck rifle cartridges like the .308 Winchester. Because they utilize flat nosed or heavy blunt bullets, they shed velocity rapidly.
However, because the 350 legend starts at a higher velocity and fires a lighter projectile, it shoots noticeably flatter than the 45/70. The 45/70 sheds its velocity incredibly fast, causing it to drop drastically past the 150 yard mark.
Bullet Drop Comparison
Assuming a 100 yard zero for both rifles, the mathematical bullet drop illustrates the superior reach of the modern AR-15 cartridge.
At 200 yards, the 350 legend drops roughly 7.5 inches. The 45/70 drops approximately 10.5 inches.
At 250 yards, the gap widens significantly. The 350 legend drops roughly 16 inches, whereas the massive 45/70 bullet drops over 24 inches. Trying to ethically harvest a deer at 250 yards with a 45/70 requires exact range estimation and significant vertical holdover.
Wind Drift Comparison
Wind deflection is mitigated by a bullet’s velocity and its aerodynamic profile.
Neither cartridge performs well in crosswinds. Their blunt frontal surface areas and low aerodynamic efficiency mean that wind easily pushes them off course. The 350 legend reaches the target slightly faster, but the 45/70 utilizes a bullet with twice the mass. At 200 yards, the massive weight of the 45/70 helps it resist wind drift slightly better than the lighter 350 legend bullet, but both require careful wind calls in open fields.
Recoil Comparison
Recoil dictates a shooter’s ability to fire rapid follow up shots and heavily influences shooter fatigue.
This is the greatest advantage of the 350 legend. It generates incredibly mild recoil, usually around 8.5 foot pounds of free recoil. It feels very similar to a standard .243 Winchester. This makes it an absolutely phenomenal choice for young hunters, beginners, or anyone sensitive to heavy recoil.
The 45/70 is brutally punishing. Pushing a 325 grain bullet to 2,050 fps from a manually operated lever action rifle transfers all the energy directly into the shooter’s shoulder. It generates approximately 35 foot pounds of free recoil. It hits with violent, bone jarring force.
Stopping Power Comparison
Stopping power on big game requires massive energy transfer and deep tissue disruption.
The 350 legend delivers excellent stopping power on medium game like whitetail deer and feral hogs inside 200 yards. The .357 caliber bullet creates a devastating wound channel, dropping deer quickly and ethically.
The 45/70 offers elite stopping power on the largest and most dangerous game on the planet. It is widely considered the ultimate defense cartridge against charging grizzly bears in dense timber. The massive kinetic energy combined with the .458 inch diameter literally crushes heavy bone and anchors massive predators with unmatched authority.
Penetration Comparison
Penetration is critical for ensuring the bullet reaches the vital organs of heavily armored animals on quartering angles.
The 45/70 is the undisputed champion in this category. A 400 grain 45/70 hard cast lead bullet possesses so much momentum that it will easily punch straight through both shoulders of a grizzly bear or bison and exit the other side.
The 350 legend penetrates exceptionally well on deer sized game, but it lacks the sheer plowing force and mass required to punch through the thick shoulder plates of a moose or a large brown bear.
Expansion Comparison
To test expansion, the industry relies on calibrated ordinance gel.
Both cartridges expand reliably when loaded with modern soft point or jacketed hollow point ammunition. A 45/70 soft point starts at .458 inches and will often mushroom to over .75 inches in diameter. A 350 legend hollow point starts at .357 inches and will easily expand past .60 inches. Both cartridges provide massive tissue disruption, ensuring rapid blood loss.
Accuracy Comparison
Both cartridges are capable of excellent mechanical accuracy at close ranges.
When fired from a high quality rifle, both can produce groups under two inches at 100 yards. The 350 legend has a slight practical advantage for the average shooter because the mild recoil prevents the shooter from developing a flinch, leading to tighter groups during range practice.
Effective Range Comparison
The effective range of a straight walled cartridge is limited by bullet drop and retained energy.
Both cartridges are generally considered 200 yard to 250 yard hunting rounds. Beyond 250 yards, they shed energy rapidly and their trajectories drop too steeply for ethical shots on game animals without precise laser rangefinders and custom dial turrets.
Suppressor Performance Comparison
Both cartridges push large volumes of gas and require specialized, large volume suppressors to handle their wide bore diameters.
Because the 45/70 is manually operated, the action stays sealed during firing, preventing gas and noise from escaping out the ejection port. This makes a suppressed lever action incredibly quiet when shooting subsonic ammunition. The 350 legend is highly effective when suppressed on an AR-15, particularly with heavy 250 grain subsonic loads, though the semi automatic action will vent some noise out the side of the rifle.
Short Barrel Performance Comparison
Many brush hunters prefer short barrels to maximize maneuverability in dense timber.
The 350 legend was designed to perform optimally in a 16 inch carbine barrel. The cartridge uses fast burning powders that achieve full combustion quickly, meaning you lose practically zero performance in a short tactical rifle.
The 45/70 utilizes slower burning rifle powders. When you fire a full power load out of a 16 inch Guide Gun barrel, a significant amount of unburnt powder erupts outside the muzzle, resulting in a blinding fireball and a deafening concussive blast.
Home Defense Comparison
Inside the home, you must balance stopping power against over penetration and weapon control.
The 45/70 is a terrible choice for suburban home defense. Firing a massive 45/70 indoors will blow clean through an intruder, through multiple interior drywall partitions, and easily penetrate the exterior of a neighboring house.
The 350 legend is a viable home defense option when chambered in an AR-15. The semi automatic 30 round capacity provides superior defensive firepower, and the recoil is easily managed. However, users should select lightweight, highly frangible bullets to reduce the risk of over penetration through drywall.
Hunting Comparison
Both cartridges are absolute hammers in the hunting woods, but they serve different roles.
The 350 legend is the ultimate state compliant whitetail deer cartridge. A hunter equipped with an AR-15 or a lightweight bolt action chambered in 350 legend can harvest deer comfortably with minimal meat damage and practically zero recoil.
The 45/70 is strictly superior for hunting massive animals like elk, moose, bison, and large brown bears. The heavy bone structures of these massive targets demand the extreme kinetic energy and deep penetration that the 45/70 provides.
Platform Compatibility
This is a defining characteristic of both rounds.
The 350 legend fits perfectly into a standard mil spec AR-15 lower receiver. It utilizes a standard 5.56 NATO bolt carrier group. To convert a standard 5.56 AR-15 into a 350 legend, a shooter simply needs to swap the barrel and use specialized 350 legend magazines.
The 45/70 is absolutely incompatible with the standard AR-15 platform. The cartridge is far too long and features a wide rimmed base. Firing the 45/70 requires a lever action rifle, a single shot rifle, or a highly specialized oversized semi automatic platform.
Magazine Compatibility
The 45/70 is perfectly designed for tubular magazines located beneath the barrel of lever action rifles. Because it utilizes flat nosed bullets, it stacks safely end to end without the risk of a pointed bullet detonating the primer of the cartridge in front of it during recoil.
The 350 legend uses dedicated aluminum or polymer AR-15 style box magazines. These magazines feature straight internal walls to accommodate the straight walled cartridge reliably.
Ammo Cost Comparison
To become proficient with a heavy rifle, you must practice frequently.
The 350 legend is incredibly affordable. Winchester and other major manufacturers mass produce full metal jacket practice ammunition for the 350 legend, making it one of the cheapest straight walled hunting cartridges on the market.
The 45/70 is a very expensive specialty cartridge. You will not find cheap bulk practice ammunition. A box of 20 premium hunting rounds typically costs more than double the price of standard 350 legend ammunition.
Ammo Availability Comparison
Walk into any gun store in the American Midwest, and you will find shelves stacked high with 350 legend ammunition due to local hunting regulations.
The 45/70 is a legendary classic that is also heavily supported by ammunition manufacturers globally. You can reliably find hunting ammunition for both calibers at practically any major sporting goods retailer.
Reloading Comparison
Both cartridges are absolute favorites in the reloading community.
They are both straight walled cartridges, meaning they are incredibly easy and fast to reload. The 45/70 offers extreme versatility, allowing handloaders to craft mild, low recoil cast lead target loads or absolute maximum pressure bear defense loads depending on the strength of their rifle.
The 350 legend is also easy to reload, but shooters must meticulously monitor their case length to ensure the cartridge headspaces correctly on the case mouth, as it lacks a traditional shoulder.
Pros and Cons
45/70
Pros
- Generates over 3,000 foot pounds of kinetic energy.
- Elite stopping power on the largest, most dangerous game on the planet.
- Massive .458 caliber bullets create devastating wound channels.
- Supreme mechanical reliability in lever action rifles.
- Deeply steeped in American hunting history.
Cons
- Generates severe, bruising recoil in lightweight lever action rifles.
- Ammunition is very expensive compared to modern intermediate cartridges.
- Massive concussive muzzle blast in short barrel configurations.
- Manually operated actions are slower to cycle under stress.
350 legend
Pros
- Fits perfectly into standard AR-15 rifles and short action bolt guns.
- Extremely mild recoil makes it perfect for young hunters.
- Fully compliant with straight wall cartridge hunting regulations.
- Ammunition is highly affordable and abundant.
- Excellent performance in highly maneuverable 16 inch barrels.
Cons
- Lacks the kinetic energy for the largest dangerous game animals.
- Requires dedicated magazines for reliable feeding in the AR-15.
- Trajectory drops quickly past 200 yards.
Final Verdict
Choosing between the 45/70 and the 350 legend comes down to balancing the modern convenience of the AR-15 platform against raw, bone crushing kinetic energy.
- For the Whitetail Deer Hunter: Choose the 350 legend. It provides all the kinetic energy needed to ethically harvest deer inside 200 yards, but with a fraction of the recoil and ammunition cost of the heavy lever action cartridge.
- For Elk, Moose, and Bear Defense: Choose the 45/70. There is no substitute for pure displacement. The massive 45/70 delivers the kinetic energy and deep penetration required to stop a charging apex predator instantly.
- For Youth Hunters and Beginners: Choose the 350 legend. The whisper light recoil and ergonomic adjustability of the AR-15 platform make it the safest and most comfortable choice for introducing new shooters to medium game hunting.
- For the Traditional Hunter: Choose the 45/70. The lever action rifle is an American classic, and carrying a big bore brush gun into the heavy timber provides a nostalgic and highly effective hunting experience.
FAQ
Is the 45/70 more powerful than the 350 legend?
Yes. The 45/70 is significantly more powerful. Because it possesses a much larger case capacity, the modern 45/70 generates over 3,000 foot pounds of kinetic energy, whereas the 350 legend generates roughly 1,800 foot pounds of energy.
Can I shoot a bear with a 350 legend?
The 350 legend is highly effective on black bears at close range. However, if you are hunting or defending against massive coastal brown bears or grizzlies, the 45/70 is universally recommended over the 350 legend due to its superior penetration and higher kinetic energy.
What magazine does a 350 legend use?
The 350 legend is designed to fit into an AR-15 magazine well, but it requires dedicated 350 legend magazines. Because the cartridge is straight walled and wider than a 5.56 NATO round, standard curved AR-15 magazines will not feed the 350 legend reliably.
Does a 45/70 kick hard?
Yes. Firing a massive 325 grain bullet out of a lightweight lever action rifle generates a heavy recoil impulse. It produces roughly 35 foot pounds of free recoil, which is a sharp, heavy blow to the shoulder that requires strong shooting fundamentals to manage comfortably.
Why was the 350 legend created?
Winchester created the 350 legend specifically to cater to hunters in Midwestern states that passed laws restricting deer hunting to straight walled cartridges only. They designed it to offer maximum straight walled performance with minimal recoil in the highly popular AR-15 platform.