It sounds like you are bolting with these Hanman? What route was that and where? Can you provide more information on your test setup, the rock type and age of these anchors etc.
We didn't find any coils in the holes and after 1/2 turn these slipped out by hand. Hilti recommends them for non permanent installations and indoor conditions.
-Fastening braces to support tilt-up and formwork
- Non-specified, temporary fastenings
Please do not bolt with non stainless steel equipment and follow the current ASCA practices and recommendations.
Just because you did not find the coil in the hole does not mean they were not in there. I am an eye witness to those bolts being placed. They had a coil sleeve.....