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Lapua built the Subsonic FMJBT with one clear goal in mind: give reloaders a .308 projectile that stays accurate when it's running slow and quiet. This 200 grain, .308 diameter full metal jacket boat tail carries the B416 bullet code and has earned its reputation as one of the most widely used .308 Win subsonic projectiles for military and law enforcement special operations work. If you're loading for a suppressed rig and want repeatable results, this is the bullet a lot of folks reach for.
The design is where it earns its keep. The boat tail base helps the bullet stay stable through the transition and downrange at subsonic speeds, and the guide section of the bullet features several grooves that reduce resistance as it travels the bore. That combination translates to clean flight and tight groups without the keyholing that lighter or poorly matched bullets can give you below the sound barrier. The G1 ballistic coefficient sits at 0.518 with a G7 of 0.235, which is strong for a heavy subsonic .30 caliber.
Stabilizing a heavy subsonic bullet comes down to twist rate. Lapua designed this one for specialized short barreled tactical rifles running sound suppressors, and handloaders report good results in barrels around 1:11.5 and faster. Slower twists can struggle to keep a 200 grain pill stable at reduced velocity, so it pays to know your barrel before you commit to a big load session.
Subsonic loading rewards consistency, and that's exactly what Lapua is known for. These are component bullets, not loaded ammunition, so you've got full control over your powder charge and velocity to dial in just under the speed of sound. Pair them with a fast burning powder, work your load down from the supersonic range to avoid squibs, and you've got the makings of a quiet, accurate setup that performs the same shot after shot.
No, these are component bullets for handloading, not finished cartridges. You'll supply your own brass, primers, and powder to build your subsonic loads. That gives you full control over your charge weight so you can tune velocity to stay just under the speed of sound.
Because it's a heavy bullet running at reduced velocity, twist rate matters more than usual. A 1:11.5 twist or faster generally does the job, and some loaders have good luck with 1:10 and quicker. Slower twists can leave a subsonic 200 grain bullet unstable, so check your barrel before committing to a big batch.
It was designed specifically for short barreled tactical rifles running sound suppressors. The boat tail and the grooved guide section help the bullet reduce bore resistance and stay stable at subsonic speeds, which keeps groups tight and avoids keyholing. That consistency is why it's one of the most widely used .308 subsonic projectiles out there.
A safe approach is to start in the supersonic range and work your charge down until you drop just below the speed of sound. This helps you avoid squib loads where a bullet fails to exit the barrel. Always consult current published load data from a trusted source and never develop loads with the suppressor attached.
| UPC | 6418267300438 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 4PL7060 |
| Shipping Weight | 3.0 |
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