double caliper
I have never shot a singel caliper release because it always made more sence to me to have the string or loop leave the release with steady presure from both sides. seems like a single would make the string bump slightly as it was released. could be wrong but I have never had any problems out of a double
I have never shot a singel caliper release because it always made more sence to me to have the string or loop leave the release with steady presure from both sides. seems like a single would make the string bump slightly as it was released. could be wrong but I have never had any problems out of a double