What twist for 38 pistol?

[Will52100]

I have a choice of 1 in 10", 1 in 14" and 1 in 20", what would be the best for a 158 grain cast flat point round nose bullet in one pistol with a 5 1/2" barrel, and the other with 8" barrel?  The load will be Swiss brand black powder.

Thanks,

Will

[Iowegan]

The standard twist rate for a 38 Special is 1:18.75. Colt used 1:14. Never heard of a twist as fast as 1:10.

[Will52100]

Thanks, 1-14 should work good then.  The barrel is a blank from Midway, I'll have to do a bit of turning on the lathe to get it to work.

[dawei]

I have a choice of 1 in 10", 1 in 14" and 1 in 20", what would be the best for a 158 grain cast flat point round nose bullet in one pistol with a 5 1/2" barrel, and the other with 8" barrel?  The load will be Swiss brand black powder. Thanks, Will

Twist rates for 38's & 357's are usually 1 in 18¾". Taurus uses a faster twist: 1 in 16". Colt used 1 in 14" I believe.

For rifles (35-36 caliber) the industry standard is 1 in 16"

[Will52100]

Thanks, I seem to remeber that practicly speeking it's very hard to "over stabilize" a bullet, especialy from an 8" pistol barrel at 30 yards or less.

I take it a slow moving heavy bullet will like 1 in 14 twist?