Try Revolver. While Grama Grass is not listed on the label as a controlled weed many of it's cousins in Same Genus are.
An other way I would try first is Roundup. Bermuda is very tolerant of Roundup and will only show signs of stress for a short period of time. Since I am in South Florida Bermuda Never goes dormant. I spray Roundup in the Height of growing season and have not lost a yard yet.
"TG doesn't give a rats ass about being "Responsible" as long as sales/production quotas are met. That's it in a nutshell. A recipe for disaster IMO." Ted Putnam 2/28/14
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"Life is tough, but it's tougher when you're stupid.” John Wayne.