It's twenty years since I instructed on the Puma HC1 but I think the limits were 6 RWU/8 LWU/12 NU degrees.
The cyclic lateral movement is limited by a shim box under the floor. There was no mistaking when the lateral limit was reached - CLUNK! The safest way to land a Puma on an untested slope was a combination of left wheel and nose up.
The slope often tends to apparently increase on soft ground after landing because the downhill wheel tends to be more heavily loaded, causing it to sink in more.