Head to head

.375 H&H vs .416 Rem Mag: Maker-Page Loads and SAAMI Specs Side by Side

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

This page puts .375 H&H and .416 Rem Mag side by side using only our own ammo guides, .375 H&H ammo (10 loads) and .416 Rem Mag ammo (5 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. 5, 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 .375 H&H and .416 Rem Mag guides. Pressures are as SAAMI lists them.

Measure	.375 H&H	.416 Rem Mag
SAAMI name	375 HOLLAND & HOLLAND MAGNUM [375 H&H MAG]	416 REMINGTON MAGNUM [416 REM MAG]
Drawing issued / revised	04/21/1980 / 08/03/2022	07/21/1989 / 08/15/2022
Maximum average pressure (transducer)	62,000 psi	65,000 psi
Crusher pressure	53,000 CUP	54,000 CUP
Cartridge overall length	3.475 in min to 3.600 in max	3.350 in min to 3.600 in max
Case length	2.850 in (−.020)	2.850 in (−.020)
Bullet diameter (as SAAMI prints it)	.376 in (−.003)	Not yet verified (the PDF text does not pair each figure with its label clearly)
Bore / groove diameter	.366 in / .376 in	Not yet verified
Twist and grooves	1 in 12.00, 6 grooves (marked optional)	1 in 14.00, 6 grooves (marked optional)
SAAMI reference velocity	Not yet verified (the PDF text does not clearly pair each weight with its velocity)	Not yet verified (the PDF text does not clearly pair each weight with its velocity)
SAAMI velocity test barrel	24 in standard rifle test barrel (SAAMI’s general statement; not among its listed exceptions)	24 in standard rifle test barrel (SAAMI’s general statement; not among its listed exceptions)

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 (where the guide table prints it) 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	.375 H&H loads in our table	.416 Rem Mag loads in our table
Federal	test barrel not listed: 5 loads, 2,400 to 2,690 fps	test barrel not listed: 3 loads, 400 gr, 2,400 fps
Remington	test barrel not listed: 1 load, 2,690 fps	—
Hornady	24 in test barrel: 4 loads, 250 to 300 gr, 2,530 to 2,800 fps	24 in test barrel: 2 loads, 400 gr, 2,400 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	.375 H&H	.416 Rem Mag
Federal Safari Swift A-Frame	Swift A-Frame, 2,450 fps, 3,998 ft-lb, test barrel not listed, item P375SA	400 gr Swift A-Frame, 2,400 fps, 5,115 ft-lb, test barrel not listed, item P416RSA
Federal Safari Trophy Bonded Bear Claw	Trophy Bonded Bear Claw, 2,400 fps, 3,837 ft-lb, test barrel not listed, item P375T1	400 gr Trophy Bonded Bear Claw, 2,400 fps, 5,115 ft-lb, test barrel not listed, item P416RT1
Federal Safari Trophy Bonded Sledgehammer Solid	Trophy Bonded Sledgehammer Solid, 2,440 fps, 3,966 ft-lb, test barrel not listed, item P375T2	400 gr Trophy Bonded Sledgehammer Solid, 2,400 fps, 5,115 ft-lb, test barrel not listed, item P416RT2

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 62,000 psi (transducer) (crusher 53,000 CUP) for .375 H&H and 65,000 psi (transducer) (crusher 54,000 CUP) for .416 Rem Mag. Source: ANSI/SAAMI Z299.4.
If bullet weight is your question: The .375 H&H loads in the table run from 250 gr to 300 gr; the .416 Rem Mag loads in the table all list 400 gr. The ranges come from each guide’s own bullet-weight section. Source: .375 H&H guide and .416 Rem Mag guide.
If you want to see the printed velocities: the slowest and fastest muzzle velocities in our table: for .375 H&H: 2,400 fps, test barrel not listed (Federal Safari Trophy Bonded Bear Claw P375T1) and 2,800 fps, 24 in test barrel (Hornady Superformance 8508). For .416 Rem Mag they are 2,400 fps, test barrel not listed (Federal Safari Swift A-Frame P416RSA) and 2,400 fps, test barrel not listed (Federal Safari Swift A-Frame P416RSA). These come from different barrels and bullets, so we show them side by side without subtracting.
If you are comparing against a box or a chronograph: SAAMI says all standard rifle test barrels are 24 in long. 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: case length 2.850 in (−.020), cartridge overall length 3.475 in min to 3.600 in max for .375 H&H; and case length 2.850 in (−.020), cartridge overall length 3.350 in min to 3.600 in max for .416 Rem Mag. Check the cartridge named in your rifle’s manual or marked on its barrel. Source: ANSI/SAAMI Z299.4.

Not yet verified

The .375 H&H guide has 10 loads and the .416 Rem Mag guide has 5, so load counts and ranges are not a measure of how many loads exist; they only reflect what is in our tables. .416 Rem Mag has the thinner table (5 loads); we state that plainly and draw no conclusion from it.
SAAMI bullet, bore and groove diameters for .416 Rem Mag are not verified in our guide (the PDF text does not pair each figure with its label clearly), so that row is marked rather than filled. SAAMI lists the .416 Rigby on its own drawing; it is a different cartridge and is not covered here.
Makers not shown in a column are not in that guide’s table (see the “Not yet verified” section of each guide), so a dash means no load in our table, not that the maker sells none.
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 .375 H&H ammo and .416 Rem Mag ammo, plus .338 Win Mag ammo, .300 Win Mag ammo, .35 Whelen ammo, .458 Lott ammo, .45-70 ammo, .338 Win Mag vs .338 Lapua, the SAAMI maximum average pressure table, the barrel length vs velocity data, the new ammo of 2026, all ammo releases, all comparisons.

Frequently asked questions

What is the SAAMI maximum pressure for .375 H&H and .416 Rem Mag?

SAAMI lists 62,000 psi (transducer) (crusher 53,000 CUP) for .375 H&H and 65,000 psi (transducer) (crusher 54,000 CUP) for .416 Rem Mag, in ANSI/SAAMI Z299.4.

Which test barrel do the makers list?

It varies by maker and load. SAAMI says standard rifle test barrels are 24 in. Our tables show the barrel each maker page lists next to every velocity, and many pages list none.

Which is better, .375 H&H or .416 Rem Mag?

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 (.375 H&H ammo and .416 Rem Mag ammo), which copy maker product pages, and from ANSI/SAAMI Z299.4.

.375 H&H vs .416 Rem Mag: Maker-Page Loads and SAAMI Specs Side by Side

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

Frequently asked questions

Sources

Keep exploring

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

Keep exploring

The Gun Release Report