.500 Maximum
title: ".500 Maximum" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["pistol-and-rifle-cartridges", "magnum-pistol-cartridges"] topic_path: "general/pistol-and-rifle-cartridges" source: "https://en.wikipedia.org/wiki/.500_Maximum" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::data[format=table title="Infobox firearm cartridge"]
| Field | Value |
|---|---|
| name | .500 Maximum |
| image | Cartridge comparison.jpg |
| caption | Left to Right (line by line) |
| .44 Magnum, .445 Super Magnum, .45 Colt, .454 Casull, | |
| .480 Ruger, .475 Maximum, .50 Action Express, .500 Linebaugh, .500 Maximum, .500 S&W Magnum, .50 Beowulf, .50 Alaskan | |
| origin | United States |
| type | Revolver cartridge |
| designer | John Linebaugh |
| bullet | .512 |
| rim_dia | .600 |
| case_length | 1.610 |
| bw1 | 400 |
| btype1 | JSP |
| vel1 | 1407 |
| en1 | 1,757 ft-lbs (2393 J) |
| bw2 | 407 |
| btype2 | LBT |
| 420 gr (27 g) LBT | |
| vel2 | 1,512 ft/s (461 m/s) |
| 1,508 ft/s (460 m/s) | |
| en2 | 2,066 ft-lbs (2801 J) |
| 2,120 ft-lbs (2875 J) | |
| bw3 | 425 |
| btype3 | LSWC |
| 435 gr (28.2 g) LBT | |
| vel3 | 1,553 ft/s (473 m/s) |
| 1,467 ft/s (447 m/s) | |
| en3 | 2,276 ft-lbs (3085 J) |
| 2,078 ft-lbs (2817 J) | |
| bw4 | 440 |
| btype4 | |
| 450 gr (29.2 g) JSP | |
| vel4 | 1,550 ft/s (470 m/s) |
| 1,383 ft/s (422 m/s) | |
| en4 | 2,347 ft-lbs (3182 J) |
| 1,911 ft-lbs (2591 J) | |
| bw5 | 515 |
| btype5 | |
| 580 gr (38 g) LBT-LFN | |
| vel5 | 1,388 ft/s (423 m/s) |
| 1,202 ft/s (366 m/s) | |
| en5 | 2,203 ft-lbs (2987 J) |
| 1,860 ft-lbs (2522 J) | |
| test_barrel_length | 5" |
| balsrc | Tafin Tests, Tafin Tests |
| :: |
| name = .500 Maximum | image = Cartridge comparison.jpg | image_size = 300px | caption = Left to Right (line by line) .44 Magnum, .445 Super Magnum, .45 Colt, .454 Casull, .480 Ruger, .475 Maximum, .50 Action Express, .500 Linebaugh, .500 Maximum, .500 S&W Magnum, .50 Beowulf, .50 Alaskan | origin = United States | type = Revolver cartridge | service = | used_by = | wars = | designer = John Linebaugh | design_date = | manufacturer = | production_date = | number = | variants = | is_SI_specs = | parent = | case type = | bullet = .512 | neck = | shoulder = | base = | rim_dia = .600 | rim_thick = | case_length = 1.610 | length = | rifling = | primer = | is_SI_ballistics = | bw1 = 400 | btype1 = JSP | vel1 = 1407 | en1 = 1,757 ft-lbs (2393 J) | bw2 = 407 | btype2 = LBT 420 gr (27 g) LBT | vel2 = 1,512 ft/s (461 m/s) 1,508 ft/s (460 m/s) | en2 = 2,066 ft-lbs (2801 J) 2,120 ft-lbs (2875 J) | bw3 = 425 | btype3 = LSWC 435 gr (28.2 g) LBT | vel3 = 1,553 ft/s (473 m/s) 1,467 ft/s (447 m/s) | en3 = 2,276 ft-lbs (3085 J) 2,078 ft-lbs (2817 J) | bw4 = 440 | btype4 = 450 gr (29.2 g) JSP | vel4 = 1,550 ft/s (470 m/s) 1,383 ft/s (422 m/s) | en4 = 2,347 ft-lbs (3182 J) 1,911 ft-lbs (2591 J) | bw5 = 515 | btype5 = 580 gr (38 g) LBT-LFN | vel5 = 1,388 ft/s (423 m/s) 1,202 ft/s (366 m/s) | en5 = 2,203 ft-lbs (2987 J) 1,860 ft-lbs (2522 J) | test_barrel_length = 5" | balsrc = Tafin Tests, Tafin Tests
::figure[src="https://upload.wikimedia.org/wikipedia/commons/5/55/Jack_Huntington_.500_Maximum.jpg" caption="Jack Huntington .500 Maximum"] ::
The .500 Maximum, also known as the .500 Linebaugh Maximum and .500 Linebaugh Long, is a revolver cartridge developed by John Linebaugh. Only a small number of custom made 5-round single-action revolvers, such as the BMF .500 Maximum manufactured by Gary Reeder Custom Guns, the Ruger Bowen .500 Maximum manufactured by Bowen Classic Arms Corporation and revolvers manufactured by John Linebaugh or Jack Huntington, are being chambered for this round, with a barrel length of up to 6.5" with no muzzle brake or ports.
References
References
- "Taffin Tests Load Data (400 gr, 407 gr, 420 gr, 425 gr, 435 gr, 450 gr)".
- "Taffin Tests Load Data (580 gr)".
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