Title says it all. What is the rifling twist of a 586/686 "no dash", -1, -2, -3, -4 version?
I understand that the SW model 14 (38 special) has (had) a rifling twist rate of 1:18.75". I was curious if the 586/686 earlier series (pre-mim, pre-lock) was similar or different.
Reason? I've been researching accuracy/bullet results of model 14's. Several reports state that the "slow twist" of the model 14 (1:18.75") barrel is not optimal for 148 grain HBWC. Several reports indicate the Colt Officer's Match 38 special revolver with 1:16" rifling was more accurate. Some reports state that if you were going to rebarrel a model 14 for optimal 148 grain hbwc accuracy that a faster rifling twist than 1:18.75" is advised (ie 1:12", 1:14"). I wondered if the SW 586 had a different rifling twist, as I have achieved very fine accuracy with it using 148 grain hbwc bullets (Precision Delta swaged, over 2.5 grains Bullseye, and having to "double lube" the factory "match lube" bullet with 50/50 beeswax/alox lube in a .360" lubrisizer die.
Getting ready to gear up for some reloading evaluations with a SW model 14 with factory barrel. Kind of curious. I guess I'll just have to run a tight patch down the barrel and mark/measure the cleaning rod. I was hoping someone knew right out of the gate.
I have to admit, I was a little surprised at the statement that the Model 14 rifling twist was "too slow", as I thought this pistol was supposed to be "magic" with a 148 grain hbwc and a target dose of Bullseye or W231 powder. Standing by for comments.
Thanks in advance.