Subsonic bullet backwards crack#

Sectional Density: 0.396 lb/inÂ² Stability at Muzzle: 1.606 Maximum PBR: 139 yd Maximum PBR Zero: 117 yd Temperature: 0.0 Â☏ Pressure: 29.92 in HgĪtmospheric Density: 0.08629 lb/ftÂ³ Speed of Sound: 1051.0 ft/s Zero Height: 0.00 in Zero Offset: 0.00 inīarrel Twist: 10.0 in Twist Direction: Right Sight Height: 1.50 in Sight Offset: 0.00 in Muzzle Velocity: 1050.0 ft/s Distance to Chronograph: 10.0 ft You'll need a rangefinder and a scope with enough elevation!īallistic Coefficient: 0.630 G1 Caliber: 0.458 inīullet Weight: 582.0 gr Bullet Length: 2.414 in

And yea, at 250yds that aerodynamic hunk of brass will drop a wee bit over five (5) FEET with a hundred yard zero on the gun. 338 whisper and use those Lehigh bullets. Yeah, I think Im gonna have a DTA barrel spun up for a.

510's are cool but screw that projectile cost. Stretching out the range for longer hits without running out of scope adjustment and you're back to. Terminal performance is only achieved with the Lehigh bullets pictured above. I want to build a.quite.hog killer that I can score accurate and deadly hits out to.150 yards or so but still be quite. What are realistic distances for subsonic rifle rounds like the. Originally Posted By: mavrick10_2000Originally Posted By: Lofty What is the best option for an accurate subsonic round that has good bullet selection for terminal performance as well? If you're actually trying to shoot a sub beyond 100yd, you might just as well be using a. No persnickety wildcat brass or dies, fits a myriad existing firearms, and 30cal projos are far from rare. My nominee is the lowly and ubiquitous 7.62x39, loaded with a biggie open base boattail, seated backward. 30 cal, that minimal case capacities will still provide all the room one needs for the small propellant charges required, and will do it with higher efficiency. I think that in practical terms, it makes little sense to be shooting bigger than. But actually, the resulting teardrop profile is very stable at low RPM's, nearly ideal for subsonic (aerodynamic) penetration, and the open base exposed lead projectile's front is very close to being a trashcan hollowpoint for terminal performance (you need every bit you can get at those velocities). Slow arcing trajectories and inconstant winds can make a mockery of questions like this one.Īlso, subsonic aerodynamics are kinda different from the kind of shooting the rest of us do.įor instance, I sometimes suggest seating an open base boattail bullet backwards, and folks just sorta snicker. Make sure the Miller number is at least 2.0 and the velocity is below the speed of sound.I don't really think that distances and subsonics are all that compatible. Run the numbers for the coldest temperature you plan to shoot in. You want to be a bit under (at least 50 fps.) to account for variation in velocity. JBM's regular calculator will tell you the speed of sound for whatever temperature you enter for the load: Although, some people say that the bullet is more likely to tumble after impact if it is around 1.7ish You want it to be above 2.0 for subsonic loads. JBM has a calculator for the miller stability number:

Subsonic bullet backwards crack#

give you a good crack when theres snow on the ground. A bullet that is subsonic in hot weather may not be in cold weather because the speed of sound decreases.

A bullet that stabilizes in hot weather, may not stabilize when it's cold out. And temperature is important if it snows where you live. It's not as much bullet weight as bullet length. Originally Posted By: Gunfighter14e2Don't think in terms of chambering,(until past 30-06 case size) think in twist rate, bullet weight, an exit speed.