375 Raptor bolt action vs semi-auto comes down to one tradeoff: an action that stays closed when it fires, or an action that chambers the next round for you. For suppressed subsonic shooting, the bolt action adds no action noise, because nothing cycles when it fires. For hogs in groups, the semi-automatic gives fast follow-up shots. Chattahoochee Munitions manufactures both: the CM7S bolt action and the CM10 semi-automatic, each in 12.5 and 16-inch lengths, plus separate subsonic and supersonic ammunition for each platform. The 375 Raptor was designed by Arne Brennan, and this guide compares the two ways to shoot it.
375 Raptor Bolt Action vs Semi-Auto at a Glance
| Feature | CM7S bolt action | CM10 semi-automatic |
|---|---|---|
| Best for | Suppressed subsonic shooting with no action noise, lighter weight | Fast follow-up shots, hogs in groups |
| Action | Remington 700 footprint, 3-lug 60-degree bolt, .308 bolt face | Large-frame AR10, centerfeed system, adjustable gas and buffer |
| Weight, 12.5 inch | 6 lb 6 oz (SBR) | 7.5 lb (SBR) |
| Weight, 16 inch | 7 lb 4 oz | 7.75 lb |
| Magazine | Magpul PMAG 10 7.62 AC, AICS pattern | Modified MDT metal, AICS pattern, 10 rounds |
| 400 gr subsonic velocity (12.5 inch) | About 1,016 fps | About 1,012 fps |
| 190 gr supersonic velocity (16 inch) | 2,450 fps | 2,430 fps |
| 400 gr subsonic overall length | 2.802 in | 2.790 in |
| Suppressor, subsonic | Enclosed | Enclosed |
| Suppressor, supersonic | Enclosed | Flow-through |
| Special options | Pistol with Tailhook brace, PLACID OTB, WOOX walnut | SilencerCo ASR or Dead Air Keymo brake option |
| Twist and barrel | 1:8, Mos-Tek 416R stainless steel, 5R rifling, E100 Blackout Cerakote on both | |
375 Raptor Bolt Action vs Semi-Auto: Which Is Quieter?
The bolt action. When a suppressed CM7S fires a subsonic round, the bullet leaves quietly and the action stays closed. There is no bolt carrier slamming back and forth and no gas venting at the chamber, and the shooter opens the bolt after the shot. That makes the CM7S a natural choice for short-barrel subsonic shooting, which is the core of what Chattahoochee Munitions does.
The CM10 is still a quiet firearm with subsonic ammunition and an enclosed suppressor, but a gas-operated rifle always adds some action noise and some gas at the ejection port. For many hunters, the faster follow-up shot is worth that difference.
375 Raptor Bolt Action vs Semi-Auto: Why the Semi-Auto Is More Than a Barrel Swap
The 375 Raptor shares the .308 bolt face, so it is tempting to think a 375 Raptor AR10 is just a new barrel on a .308 rifle. It is not. The 400 gr subsonic cartridge is long (2.790 inches for the semi-auto load) and runs at low pressure, so a semi-automatic has to feed long rounds reliably and cycle on less gas. The CM10 handles that with a centerfeed system and a modified MDT metal magazine, a Superlative Arms adjustable gas block, and an Odin Works adjustable AR10 buffer, so it can be tuned to run both subsonic and supersonic loads. A bolt action has none of those concerns, because the shooter cycles it by hand.
375 Raptor Bolt Action vs Semi-Auto Ammunition
Chattahoochee Munitions loads 375 Raptor ammunition separately for each platform, and each load should be used only in the firearm it is made for:
- Bolt action: the 400 gr subsonic for bolt action is configured for a manually operated rifle and is not intended to cycle a semi-automatic. A 190 gr supersonic bolt action load is also offered.
- Semi-auto: the 400 gr subsonic for semi-auto is configured to cycle the CM10 and loaded to 2.790 inches for reliable magazine feeding. A 190 gr supersonic semi-auto load is also offered.
All four loads use lead-free solid copper Maker Bullets projectiles. Full trajectory tables are in 375 Raptor ballistics.
375 Raptor Bolt Action vs Semi-Auto Suppressors
Use a suppressor rated for .375 caliber, such as the PLACID 375. For subsonic ammunition, an enclosed suppressor is recommended on both the CM7S bolt action and the CM10 semi-automatic. For supersonic ammunition, the CM7S stays with an enclosed suppressor, while a flow-through suppressor is recommended on the CM10. Only the bolt action is offered with the PLACID OTB, a titanium over-the-barrel suppressor on the 12.5-inch CM7S that keeps the suppressed rifle short. The 375 Raptor suppressor guide covers the choice in detail.
375 Raptor Bolt Action vs Semi-Auto for Hunting
For whitetail deer from a stand or blind, the CM7S bolt action adds no action noise and is a lighter rifle to carry in. For feral hogs, which often move in groups and at night, the CM10 semi-automatic gives fast follow-up shots on a second or third animal. Both fire the same 400 gr subsonic and 190 gr supersonic bullets, so terminal performance is the same; the difference is how fast the next round is ready. Read 375 Raptor hunting for guidance by game and distance.
375 Raptor Bolt Action vs Semi-Auto: Which Should You Choose?
- Choose the CM7S bolt action for suppressed subsonic shooting with no action noise, a lighter weight, a pistol configuration, or the PLACID OTB. See the 12.5-inch CM7S, the 12.5-inch CM7S with PLACID OTB, and the 16-inch CM7S.
- Choose the CM10 semi-automatic for fast follow-up shots, especially on hogs. See the 12.5-inch CM10 SBR and the 16-inch CM10 rifle.
Browse every configuration in the Raptor Paddock, and see 375 Raptor barrel length and 375 Raptor twist rate for the barrel details both platforms share.
375 Raptor Bolt Action vs Semi-Auto FAQ
Is a bolt action or semi-auto better for 375 Raptor?
A bolt action suits suppressed subsonic shooting with no action noise, at a lighter weight. A semi-auto is better for fast follow-up shots, especially on hogs.
Who makes 375 Raptor bolt action and semi-auto rifles?
Chattahoochee Munitions manufactures complete factory 375 Raptor firearms in both: CM7S bolt action rifles, SBRs, and pistols, including PLACID OTB and WOOX walnut models, and CM10 semi-automatic rifles and SBRs.
Is a 375 Raptor bolt action quieter than a semi-auto?
Yes. A bolt action does not cycle when it fires, so it adds no action noise and vents no gas at the chamber.
Can I use bolt action 375 Raptor ammo in a semi-auto?
No. The bolt action subsonic load is not intended to cycle a semi-automatic. Use the semi-auto load in the CM10.
Is a 375 Raptor AR10 just a .308 with a new barrel?
No. The CM10 uses a centerfeed system, a modified MDT metal magazine, an adjustable gas block, and an adjustable buffer to feed and cycle long, low-pressure 375 Raptor rounds reliably.
What magazine does a 375 Raptor use?
The CM7S uses a Magpul PMAG 10 7.62 AC AICS-pattern magazine. The CM10 uses a modified MDT metal AICS-pattern magazine with 10 rounds.
Which is lighter, the CM7S or the CM10?
The CM7S. The 12.5-inch CM7S SBR weighs 6 lb 6 oz and the 12.5-inch CM10 SBR weighs 7.5 lb.
Which suppressor should I use on a 375 Raptor bolt action vs semi-auto?
Enclosed on both for subsonic. For supersonic, enclosed on the bolt action and flow-through on the semi-auto.
Who designed the 375 Raptor?
The 375 Raptor was designed by Arne Brennan. Chattahoochee Munitions manufactures 375 Raptor bolt action and semi-automatic firearms and ammunition.