History
The 375 EnABELR is a proprietary .375 caliber cartridge built for two-mile work, fed by the heaviest high-BC solids the bore will take, notably Berger's 407 grain ELR Match Solid (G7 0.507). It comes from its maker by direct or custom order. Driven fast, a projectile that slick stays supersonic and carries useful energy past 2,000 yards, which puts the round in the same class as the .375 CheyTac and .416 Barrett.
There is no SAAMI or C.I.P. standard behind it, and no mass-market factory ammunition; brass and loaded rounds come from the maker. The case dimensions and the cutaway below are taken from the maker's maximum-cartridge print; confirm them against the maker's own data before relying on them.
Lineage
A large, beltless ELR case throws the .375 inch (9.53mm) bullet, fed from a dedicated magnum-length action on a large rifle magnum primer. Among the big .375 and larger cartridges built to carry heavy high-BC bullets to extreme distance, it sits with the .375 CheyTac, .408 CheyTac, and .416 Barrett.
Specifications
| Spec | Value |
|---|---|
| Case type | Rimless rebated, bottlenecked (~21° shoulder) |
| Bullet diameter | 9.53 mm (.375 in) |
| Neck diameter | 10.41 mm (.410 in) |
| Shoulder diameter | 16.15 mm (.636 in) |
| Base diameter | 16.71 mm (.658 in) |
| Rim diameter | 16.25 mm (.640 in, rebated) |
| Case length | 70.36 mm (2.770 in) |
| Overall length | 117.48 mm (4.625 in) |
| Primer size | Large rifle magnum |
| Belted | No |
| Rifling twist | 1 in 8.5 in (recommended, for heavy .375 solids) |
| Max pressure | No published SAAMI/C.I.P. figure |
| Recommended barrel | 38 in, 1:8.5 twist |
Dimensions are from the maker maximum-cartridge print. The case is rebated (the .640 inch rim is narrower than the .658 inch body) and has a published shoulder datum (.500 in).
Barrel Design
The twist I'd recommend is 1:8.5, fast enough to stabilize the 407 grain solid with margin through the transonic range past two miles. Those lathe-turned solids carry the high ballistic coefficients that justify the round's recoil and cost.
I set the baseline at 38 inches. The extra length burns the large powder charge and keeps the heavy bullet supersonic past 2,000 yards. The rifle is heavy, the report serious, the ammunition expensive, all of which a two-mile cartridge demands. The tables below run that 38 inch barrel and the 407 grain Berger ELR Solid load; since muzzle velocity tracks barrel length closely, confirm your own on a chronograph before trusting any dial.
Handload Performance
Handload · 407 gr Berger ELR Match Solid
| Range (yd) | Velocity (fps) | Elevation (mil) | Energy (ft-lb) | Windage (mil) |
|---|---|---|---|---|
| 0 | 2950 | -0.3 | 7864 | 0.3 |
| 100 | 2861 | 0.0 | 7398 | 0.2 |
| 200 | 2774 | -0.3 | 6953 | 0.3 |
| 300 | 2688 | -0.8 | 6529 | 0.5 |
| 400 | 2603 | -1.4 | 6124 | 0.6 |
| 500 | 2520 | -2.1 | 5740 | 0.8 |
| 600 | 2439 | -2.8 | 5374 | 0.9 |
| 700 | 2359 | -3.5 | 5027 | 1.1 |
| 800 | 2280 | -4.3 | 4698 | 1.3 |
| 900 | 2203 | -5.1 | 4387 | 1.5 |
| 1000 | 2128 | -5.9 | 4092 | 1.6 |
| 1100 | 2054 | -6.8 | 3813 | 1.8 |
| 1200 | 1982 | -7.7 | 3549 | 2.0 |
| 1300 | 1911 | -8.7 | 3299 | 2.2 |
| 1400 | 1841 | -9.8 | 3062 | 2.5 |
| 1500 | 1772 | -10.9 | 2837 | 2.7 |
| 1600 | 1704 | -12.0 | 2624 | 2.9 |
| 1700 | 1638 | -13.2 | 2423 | 3.2 |
| 1800 | 1572 | -14.5 | 2233 | 3.5 |
| 1900 | 1508 | -15.9 | 2054 | 3.7 |
| 2000 | 1445 | -17.3 | 1886 | 4.0 |
| 2100 | 1383 | -18.8 | 1728 | 4.4 |
| 2200 | 1323 | -20.5 | 1581 | 4.7 |
| 2300 | 1264 | -22.2 | 1444 | 5.0 |
| 2400 | 1207 | -24.0 | 1317 | 5.4 |
| 2500 | 1153 | -26.0 | 1202 | 5.8 |
| 2600 | 1108 | -28.1 | 1109 | 6.2 |
| 2700 | 1079 | -30.3 | 1052 | 6.7 |
| 2800 | 1057 | -32.7 | 1010 | 7.1 |
| 2900 | 1039 | -35.2 | 975 | 7.5 |
| 3000 | 1022 | -37.9 | 944 | 8.0 |
| 3100 | 1007 | -40.7 | 915 | 8.4 |
| 3200 | 992 | -43.6 | 889 | 8.9 |
| 3300 | 978 | -46.7 | 864 | 9.3 |
| 3400 | 964 | -49.9 | 840 | 9.8 |
Muzzle velocity 2950 fps is the factory figure from a 38 in test barrel. Expect your own barrel to read a little differently. Velocity is color coded green supersonic, yellow transonic, red subsonic; treat transonic and subsonic rows as approximate.
Trajectory
FAQ
What barrel length and twist should I run?
A 1:8.5 twist for the heavy .375 solids the cartridge is built around, and a long 38 inch barrel to collect velocity and hold them supersonic past two miles. This is a dedicated extreme-long-range build.
Is the 375 EnABELR a SAAMI cartridge?
No. The 375 EnABELR is a proprietary, direct-order cartridge with no SAAMI or C.I.P. standard and no mass-market factory ammunition. The case dimensions and cutaway on this page come from the maker's maximum-cartridge print rather than a standards body, so confirm the specifications against the maker's own data.
How does it compare to the .375 CheyTac?
Both are large .375 ELR cartridges built around very-high-BC solids for two-mile work. The .375 CheyTac is C.I.P. standardized with an established following and ammunition you can source; the 375 EnABELR is a proprietary, direct-order alternative tuned around the heaviest modern .375 solids. They occupy the same ground from opposite ends: standard versus bespoke.
What is it good for?
Extreme long range: two-mile competition and long-range steel, where a heavy, high-BC .375 held supersonic past 2,000 yards justifies the size, recoil, and expense. It is not a general-purpose cartridge.