twist rate

[hntrdav]

Anyone know why marlin lever 44's have a 1 in 38 twist while rugers 44 carbines have a 1 in 20 twist? And why the big difference?

 

[hntrdav]

I thought I put this under long guns I didn't mean to list it under hand guns.

 

[redneckmedic]

Thats a great question for fireball.

 

[seamusalaska]

Good question. Microgroove? How are twist rates figured out anyway?

 

[451_Detonics]

The 1894's have Ballard rifling, not Microgroove. While the other calibers have a 1 in 16 twist the 44 was done expressly for a cast bullet (200 to 240 gr)at moderate speeds for Cowboy shooters.

 

[DeadeyeChrista'sdad]

I thought that the 1894 .44s had both ballard and microgroove, with all of the octagon CB rifles being ballard only, but round barrels either, in different years. Am I reading wrong?

 

[jnicol6600]

Ive got an 1894ss with ballard rifling and 1 in 38 twist. I wish it had faster cause mine wont stabilize 300 gr bullets

 

[hntrdav]

The owner of my local shop said the faster twist was for the 300 gr bullets, but the 240's seem to fly the same from both guns for me.

 

[fireball168]

Anyone know why marlin lever 44's have a 1 in 38 twist while rugers 44 carbines have a 1 in 20 twist?

And why the big difference?

The Rugers have two primary markets - the plinkers and the hunters.


The Marlins have the plinkers, the hunters and the CASS folks.


But - interestingly enough, the 1894's in 45 Colt were/are 16 twist, and the 357's have been 16 twist as long as I can remember.


Too bad the Ruger won't feed the heavies out of the magazine as well as the Marlins will out of the tube (generally).


If I were to rebarrel a 44, I'd probably go with a 20-24 twist for the entire spectrum of projectiles.

 

[Yeah]

Twist rates are simple math, the Greenhill equation. Longer bullets generally require faster twist to stabilize and since a given caliber is diameter constrained the only way to add mass is to make the bullet longer.

Barrel Twist Calculator