The 7mm PRC: Specs, Ballistics and Origins

The 7mm PRC is Hornady’s 7mm Precision Rifle Cartridge, a long-action centerfire rifle cartridge designed around long, heavy-for-caliber 0.284-inch bullets. Hornady positions it between the 6.5 PRC and the 300 PRC, with a standard long-action overall length, a non-belted case, a 30-degree shoulder and a 1:8-inch twist intended for modern low-drag bullets.

For elk and long-range hunters, the main idea is simple: the 7mm PRC is a modern 7mm magnum-style cartridge with published factory loads using bullets such as Hornady’s 160 grain CX, 175 grain ELD-X and 180 grain ELD Match. It is not a shortcut around field judgment, wind calls or hunting regulations, but it is built around bullets and dimensions that suit long-range 7mm performance.

Where the 7mm PRC fits in Hornady’s PRC family

Hornady describes the 7mm PRC as a long-action centerfire rifle cartridge. Hornady also says it fits the niche between the 6.5 PRC and the 300 PRC.

That positioning matters because the PRC line is not just a list of bore sizes. Hornady’s description of the 7mm PRC emphasizes long, heavy-for-caliber bullets in a standard long action. In Hornady’s 7mm PRC load data, the company calls it an efficient, capable and balanced 7mm magnum, released as a new product for 2023 and developed by Hornady’s Ballistic Development Group.

Hornady also says the cartridge uses temperature-stable, magnum-speed propellants for consistent velocity and longer barrel life. That statement is Hornady’s own description of its design and ammunition approach.

If you are comparing the cartridge within the broader PRC family, the simple placement is this: the 7mm PRC is the 7mm long-action option between the smaller 6.5 PRC and the larger 300 PRC. For more context, see our comparison of 6.5 Creedmoor vs 6.5 PRC.

Origins and case design

Hornady states that the parent case for the 7mm PRC is the 375 Ruger. Hornady’s load data says the case was shortened to 2.280 inches while retaining a .532-inch diameter, a non-belted case and a 30-degree shoulder.

Hornady’s data supports a clear description: the 7mm PRC is a modern non-belted 7mm cartridge based on the 375 Ruger case family, with geometry selected around contemporary long bullets.

Hornady says the cartridge was designed from the ground up with chamber geometry, efficient case shape and appropriate overall length. Hornady ties those features, along with the 1:8-inch twist rate, to the use of 21st century low-drag bullets.

SAAMI and Hornady dimensional specs

The 7mm PRC’s key published dimensions line up around a long-action cartridge overall length and 0.284-inch bullets. Hornady load data lists a 0.284-inch bullet diameter, 3.340-inch maximum cartridge overall length, 2.280-inch maximum case length and 2.270-inch trim length.

SAAMI also lists a 0.277-inch bore diameter and 0.284-inch groove diameter.

Specification	Published value
Cartridge type	Long-action centerfire rifle cartridge, per Hornady
Parent case	375 Ruger, per Hornady
Bullet diameter	0.284 inch, per Hornady
SAAMI bore diameter	0.277 inch
SAAMI groove diameter	0.284 inch
Maximum case length	2.280 inches, per Hornady
Case trim length	2.270 inches, per Hornady
Hornady maximum COL	3.340 inches
Case head description	.532-inch diameter, non-belted case, per Hornady
Shoulder angle	30 degrees, per Hornady
SAAMI test barrel length	24.000 inches
SAAMI twist entry	8.00-inch right-hand twist, 6 grooves

Twist rate and long, high-BC bullets

The 7mm PRC’s twist rate is one of the defining points of the cartridge. Hornady load data lists a 24-inch barrel with a 1:8-inch twist. SAAMI’s 7mm PRC drawing specifies 6 grooves and an 8.00-inch right-hand twist.

Hornady specifically connects that twist rate to modern low-drag bullets.

For hunters, Hornady identifies the 160 grain CX and 175 grain ELD-X as hunting bullets for the 7mm PRC. Hornady describes those bullets as providing performance at close and extended range.

This is the practical design story behind the cartridge. It is not just that the 7mm PRC fires 7mm bullets. It is that the published chamber, overall length and twist data were built around long, low-drag 7mm bullets without seating them too deep, according to Hornady’s description.

Published factory ballistics

Factory ballistics vary by ammunition line, barrel, bullet and test method, so the most useful comparison is to stay with published manufacturer tables. Hornady’s listed 7mm PRC factory loads use a 24-inch test barrel in the examples below.

Factory load	Muzzle velocity	Muzzle energy	500-yard velocity	500-yard energy
Hornady 160 gr CX Outfitter	3,000 fps	3,197 ft-lb	2,254 fps	1,804 ft-lb
Hornady 175 gr ELD-X Precision Hunter	3,000 fps	3,497 ft-lb	2,347 fps	2,141 ft-lb
Hornady 180 gr ELD Match	2,975 fps	3,439 ft-lb	2,408 fps	2,253 ft-lb

These numbers show a published Hornady factory-ammunition pattern: 7mm PRC loads include bullets from 160 grains to 180 grains, with listed muzzle velocities from 2,975 fps to 3,000 fps in the Hornady data included here.

7mm PRC vs 7mm Remington Magnum

The 7mm PRC and 7mm Remington Magnum are often compared because both are 7mm magnum-class hunting cartridges. A careful comparison should stay with published specifications rather than claiming one is universally better.

The cleanest way to summarize the difference is that the 7mm PRC is a newer Hornady design built around a non-belted case, modern chamber geometry, a 3.340-inch maximum overall length and a faster 1:8-inch twist for long, low-drag bullets. The 7mm Remington Magnum remains a separate SAAMI-standardized 7mm cartridge with its own specifications.

What elk and long-range hunters should take from the specs

The 7mm PRC’s appeal is easy to understand from the published data. It combines a standard long-action format, 0.284-inch bullets, a 1:8-inch twist and factory loads built around bullets such as the 160 grain CX, 175 grain ELD-X and 180 grain ELD Match.

Hornady lists the 160 grain CX Outfitter and 175 grain ELD-X Precision Hunter as hunting loads. Hornady identifies the 160 grain CX and 175 grain ELD-X as hunting bullets for the cartridge. The company’s factory table lists the 175 grain ELD-X at 3,000 fps and 3,497 ft-lb at the muzzle, with 2,347 fps and 2,141 ft-lb at 500 yards from a 24-inch test barrel.

For long-range target use, Hornady’s 180 grain ELD Match factory load is listed at 2,975 fps and 3,439 ft-lb at the muzzle, with 2,408 fps and 2,253 ft-lb at 500 yards from a 24-inch test barrel.

The important caution is that published cartridge performance is not the same thing as a field guarantee. Velocity can vary by rifle and barrel. Hunting use also depends on the bullet, distance, shot angle, local rules and the shooter’s ability to place the shot.

Bottom line

The 7mm PRC is Hornady’s long-action 7mm PRC-family cartridge, introduced as a 2023 product. Hornady built it around the 375 Ruger parent case, a shortened 2.280-inch case, non-belted .532-inch case head, 30-degree shoulder, 3.340-inch maximum overall length and a 1:8-inch twist for modern low-drag bullets.

Before using any cartridge for hunting, confirm current ammunition, rifle and season requirements with the state, provincial or territorial wildlife agency. For technical data, check the current SAAMI standard and the ammunition maker’s current product information for the exact load you plan to use.