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7mm Rem Mag vs 7mm PRC: Maker-Page Loads and SAAMI Specs Side by Side

By Cole Harlan, EditorUpdated Nov 5, 2026How we verifyEditorial standards

This page puts 7mm Rem Mag and 7mm PRC side by side using only our own ammo guides, 7mm Rem Mag ammo (29 loads) and 7mm PRC ammo (13 loads), plus the cartridge specs SAAMI publishes in ANSI/SAAMI Z299.4, its centerfire rifle standard. The guides copy bullet weights, velocities, energies and test barrels from maker product pages (checked Nov. 4, 2026). We don’t rate or rank cartridges, and we don’t subtract one maker’s velocity from another’s, because their test barrels differ.

How to read this page: every number is copied from a maker page or from SAAMI, and a test barrel length sits next to every velocity (or says the maker lists none). A dash (—) means the maker has no load in our tables for that cartridge. Fire only the cartridge your rifle’s maker says it is chambered for.

SAAMI specs side by side

These are the figures in ANSI/SAAMI Z299.4 (approved Feb. 10, 2025), as already recorded in the SAAMI sections of our 7mm Rem Mag and 7mm PRC guides. Pressures are as SAAMI lists them.

Measure	7mm Rem Mag	7mm PRC
SAAMI name	7MM REMINGTON MAGNUM [7MM REM MAG]	7MM PRECISION RIFLE CARTRIDGE [7MM PRC]
Drawing issued / revised	04/21/1980 / 12/06/2021	06/07/2022 / no revision date shown
Maximum average pressure (transducer)	61,000 psi	65,000 psi
Crusher pressure	52,000 CUP	Not established
Cartridge overall length	3.150 in min to 3.290 in max	3.090 in min to 3.340 in max
Case length	2.500 in (−.020)	2.280 in (−.020)
Bullet diameter	.2845 in (−.003)	.2844 in (−.0030)
Bore / groove diameter	.277 in / .2837 in	.277 in / .284 in
Twist and grooves	1 in 9.50 in, right-hand (marked optional), 6 grooves	1 in 8.00 in, right-hand (marked optional), 6 grooves
SAAMI reference velocity (15 ft from test barrel)	Not copied in our guide	2,950 fps for 180 gr
SAAMI velocity test barrel	Not copied in our guide (SAAMI says standard rifle test barrels are 24 in)	24.000 in (±.010), 1:8.00 twist, 6 grooves

SAAMI measures pressure two ways for some cartridges, by transducer and by crusher; compare psi with psi and CUP with CUP, not across. SAAMI lists a crusher pressure for 7mm Rem Mag and none for 7mm PRC. The 7mm PRC reference velocity is for a 180 gr bullet; our 7mm Rem Mag guide does not record a SAAMI reference velocity, so there is no pair to compare.

Load ranges by maker and test barrel

Each line groups one maker’s loads that share a test barrel, so a velocity is only ever shown with the barrel it was measured in. Ranges are bullet weight and muzzle velocity as the maker page prints them. Do not read across makers: their barrels and bullets differ. For how barrel length moves velocity, see our barrel length vs velocity data.

Maker	7mm Rem Mag loads in our table	7mm PRC loads in our table
Federal	test barrel not listed: 14 loads, 140 to 175 gr, 2,760 to 3,150 fps	test barrel not listed: 5 loads, 155 to 195 gr, 2,760 to 3,100 fps
Remington	test barrel not listed: 7 loads, 140 to 175 gr, 2,860 to 3,175 fps	—
Hornady	24 in test barrel: 8 loads, 139 to 162 gr, 2,975 to 3,240 fps	24 in test barrel: 4 loads, 154 to 180 gr, 2,975 to 3,030 fps
Berger	—	24 in test barrel: 2 loads, 175 to 195 gr, 2,800 to 2,920 fps
Nosler	—	24 in test barrel: 1 load, 160 gr, 3,031 fps test barrel not listed: 1 load, 175 gr, 3,000 fps

Same maker, same line, both cartridges

Where one maker sells the same product line in both cartridges, the loads are listed side by side exactly as the maker pages print them. We match lines by the maker’s own product-line name in our guide tables. Compare only within a row, and check the test barrel in each cell.

Maker line	7mm Rem Mag	7mm PRC
Federal ELD-X	162 gr ELD-X, 2,940 fps, 3,109 ft-lb, test barrel not listed, item P7RELDX1	175 gr ELD-X, 3,000 fps, 3,497 ft-lb, test barrel not listed, item P7PRCELDX1
Federal Fusion Tipped Rifle	175 gr Fusion Tipped, 2,775 fps, 2,992 ft-lb, test barrel not listed, item F7RTFS2	175 gr Fusion Tipped, 2,925 fps, 3,324 ft-lb, test barrel not listed, item F7PRCTFS2
Federal Terminal Ascent	155 gr Terminal Ascent, 3,000 fps, 3,097 ft-lb, test barrel not listed, item P7RTA1	155 gr Terminal Ascent, 3,100 fps, 3,307 ft-lb, test barrel not listed, item P7PRCTA1 170 gr Terminal Ascent, 2,950 fps, 3,285 ft-lb, test barrel not listed, item P7PRCTA3
Hornady American Whitetail Tipped	154 gr SST® American Whitetail® TIPPED, 3,025 fps, 3,129 ft-lb, 24 in test barrel, item 80601	154 gr SST® American Whitetail® TIPPED, 3,030 fps, 3,139 ft-lb, 24 in test barrel, item 80714
Hornady Outfitter	150 gr. CX® Outfitter®, 3,000 fps, 2,997 ft-lb, 24 in test barrel, item 806114	160 gr CX® Outfitter®, 3,000 fps, 3,197 ft-lb, 24 in test barrel, item 80713
Hornady Precision Hunter	162 gr ELD-X® Precision Hunter®, 2,975 fps, 3,183 ft-lb, 24 in test barrel, item 80636	175 gr ELD-X® Precision Hunter®, 3,000 fps, 3,497 ft-lb, 24 in test barrel, item 80712

What the sources say when you choose

These are points taken from the figures above, each with the page it rests on. They are not recommendations or scores.

If pressure rating is your question: SAAMI lists a maximum average pressure of 61,000 psi by transducer for 7mm Rem Mag and 65,000 psi for 7mm PRC. It lists 52,000 CUP by crusher for 7mm Rem Mag and establishes no crusher pressure for 7mm PRC. Source: ANSI/SAAMI Z299.4.
If bullet weight is your question: the 7mm Rem Mag loads in our table run from 139 gr (Hornady American Whitetail 80591) to 175 gr (Federal Fusion Rifle F7RFS2). The 7mm PRC loads run from 154 gr (Hornady American Whitetail Tipped 80714) to 195 gr (Federal Berger Elite Hunter P7PRCEH1). Sources: those maker pages.
If you want to see the printed velocities: the slowest and fastest 7mm Rem Mag muzzle velocities in our table are 2,760 fps, test barrel not listed (Federal Fusion Rifle F7RFS2) and 3,240 fps, 24 in test barrel (Hornady Superformance 80593). For 7mm PRC they are 2,760 fps, test barrel not listed (Federal Berger Elite Hunter P7PRCEH1) and 3,100 fps, test barrel not listed (Federal Terminal Ascent P7PRCTA1). These come from different barrels and bullets, so we show them side by side without a difference. Sources: those maker pages.
If you are comparing against a box or a chronograph: SAAMI’s rifle test barrel is 24 in for both cartridges. Many maker pages list a different barrel or none, as the tables above show. A shorter barrel than the one a maker lists will likely give lower velocities than the box; see our barrel length vs velocity data. Source: ANSI/SAAMI Z299.4 and the maker pages linked above.
If chamber fit is your question: SAAMI publishes a separate cartridge drawing for each. It lists case length 2.500 in (−.020) and cartridge overall length 3.150 in min to 3.290 in max for 7mm Rem Mag, and case length 2.280 in (−.020) and cartridge overall length 3.090 in min to 3.340 in max for 7mm PRC. Bullet diameters are .2845 in (−.003) and .2844 in (−.0030). Check the cartridge named in your rifle’s manual or marked on its barrel. Source: ANSI/SAAMI Z299.4.

Not yet verified

Winchester and SIG Sauer loads are not in either guide’s table (see the “Not yet verified” section of each guide). Remington has no 7mm PRC load in our table, and Nosler and Berger have no 7mm Rem Mag load in ours.
A dash in the range table means the maker has no load in that guide’s table, not that the maker sells none.
Our 7mm Rem Mag guide does not record a SAAMI reference velocity, so none is shown for it.
The two guides cover different makers, so the load counts are not like-for-like and say nothing about popularity.
Prices, recoil, accuracy and hands-on results are not in our data, so this page says nothing about them.

See the full tables in our 7mm Rem Mag ammo and 7mm PRC ammo, the barrel length vs velocity data, 7mm PRC vs .300 PRC, .300 Win Mag vs .300 PRC, 6.5 Creedmoor vs 6.5 PRC, .308 Win vs .300 Win Mag, the new ammo of 2026, all ammo releases and all comparisons.

Frequently asked questions

What is the SAAMI maximum pressure for 7mm Rem Mag and 7mm PRC?

SAAMI lists 61,000 psi (transducer) and 52,000 CUP (crusher) for 7mm Rem Mag, and 65,000 psi (transducer) with no crusher pressure for 7mm PRC, in ANSI/SAAMI Z299.4.

Do 7mm Rem Mag and 7mm PRC use the same bullet diameter?

SAAMI lists .2845 in (−.003) for 7mm Rem Mag and .2844 in (−.0030) for 7mm PRC in ANSI/SAAMI Z299.4.

Which is better, 7mm Rem Mag or 7mm PRC?

We don't rate or rank cartridges. This page copies maker-page figures and SAAMI specs side by side, and it does not cover price, recoil or hands-on results.

Where do these numbers come from?

From our own ammo guides (7mm Rem Mag ammo and 7mm PRC ammo), which copy maker product pages, and from ANSI/SAAMI Z299.4.

SAAMI specs side by side

Load ranges by maker and test barrel

Same maker, same line, both cartridges

What the sources say when you choose

Not yet verified

Related guides

Frequently asked questions

Sources

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