Dec 23, 2008 · When a bullet manufacturer rates on for a twist, they are usually talking long barrel (= or > 16") and factory typical muzzle velocities. Muzzle velocity of M193 is typically 3250 fps. I typically go a little slower for shorter barrels and faster twists 1:7 or 1:8 and go for right at the 3,200 for longer barrel slower twists, 16" to 24" 1:9 to 1:12. Oct 27, 2017 · 22 Nosler is all about pushing maximum velocity with a 22 caliber projectile from an AR-15 with minimal required changes to the rifle. With just a barrel and magazine swap, you can push a 55 grain projectile from a 22 Nosler AR-15 with a gain of 20% more muzzle energy compared to .223 Remington: a significant boost.
Nov 05, 2020 · Preferred Barrel Blanks Our company specializes in producing barrel blanks for precision firearms. We hold minimum tolerances across the caliber spectrum including minimum muzzle drift. Our enthusiasm for barrels shows with our quality and willingness to accommodate small batch orders as well as high-volume demands. Let us show you that we can make a difference in your firearms! Precision Air ... Starting load. Weight. Velocity, barrel length [mm]. 1) A muzzle velocity exceeding 1000 m/s ( 3300 fps) may lead to severe barrel fouling! .308 Winchester. Test barrel: 610 mm (24"), 1 in 12" twist Primers: Large Rifle Cases: Lapua, trim-to length 51,00 mm (2.008").
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