On Tuesday, 16 January 2018 07:38:48 UTC+2, wrote:
The glider is rated for loops. Entry speed 97 knots. Im just wondering if any other cirrus owner frequently loop and how it behaves

The Cirrus may have been rated for loops when it was new and free of repairs, control slop, etc. so unless your 40+ year old glider is in pristine condition with no accident history you will need to take all those approved maneuvers and Vne with a pinch of salt.
I would not try it myself.