What would be the best twist rate for 23 inch barrels in 30 cal shooting 44.5 - 56 grs slugs?
twist rates for 30 cal 45-55 gr slugs
- Thread starter LFCM
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Just a beginner, but I don't believe the barrel length matters...it's the "twist" inside the barrel.
Slugs need more spin than pellets. I see many in the range of 1:15 to 1:25. The rate is how many inches it takes for the projectile to complete a full turn, so 1:15 spins faster than 1:25.
Slugs need more spin than pellets. I see many in the range of 1:15 to 1:25. The rate is how many inches it takes for the projectile to complete a full turn, so 1:15 spins faster than 1:25.
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1-20 @ for 56g and a 1-26 of the 45's as a suggestion, tho a 1-26 may shoot both well if the heavier slugs can be shot fast !!
For ANY given twist rate the Faster said projectile passes down the barrels length, higher will be it's exit RPM ... so in other words a barrels twist rate that might be on the too slow of twist can be coaxed into some added heavier projectile stability if said projectile can get sped up.
JMO ...
For ANY given twist rate the Faster said projectile passes down the barrels length, higher will be it's exit RPM ... so in other words a barrels twist rate that might be on the too slow of twist can be coaxed into some added heavier projectile stability if said projectile can get sped up.
JMO ...
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Motorhead, can you expand a bit on the "faster" issue. My understanding is that regardless of the FPS, a 1:25 for example will always spin the projectile one time each 25 inches because that is how the barrel is "cut." If you had a 25" barrel and a 1:25 twist rate, the pellet, etc. would revolve one time whether it took .1 second or 10 seconds to leave the barrel?
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