Originally Posted by JARHEAD1371
I'm looking at having a .270 WSM rifle built but concerned if the 1-10 twist will be able to stabilize the heavier bullets. Any advice?
I had an interesting conversation with Tracy Bartlein just last week about his gain twist bbls. I cannot possibly regurgitate the conversation, and he did state that the jury is still out on this topic, so to speak. But, he's getting reports of lower aggs from some shooters using his 3/4 gain twist bbls.
In fact, when it comes time to rifle my 6.5 bbl, he or Frank will call me to confirm, but I am interested in trying this rifling. I ordered an 8 Twist. What will happen is he'll calculate a gradual increase in twist (if I recall) from breech to muzzle but I must give him the finished bbl length.
What will happen is the bore will begin at about an 8.96 twist and at the muzzle will finish at an 8 twist. This will be one of their 5R bbls.
What you may consider is discussing a gain twist bbl for your 270 WSM. Tell them what the finished length of the bbl will be and have it end at a 9 or 9.25 twist. They will calculate the gain to the muzzle and it will likely begin at around a 10 twist.
Just a thought.