The Puma, and subsequent descendants, had a restrictor valve inserted in the nose jack at the down hydraulic entry to slow the lowering and avoiding it slamming against the internal stops. I had it happen once but I didn't worry about it after I had isolated the hydraulics. On landing the nosewheel is jammed against the bay wall and the debris from the fractured jack prevents it from moving back so sandbags are unnecessary.
This was in the Thetford PTA and it was a toss up as to whether to fly it back to Odiham as both hydraulic tanks were still full. In the end we changed the nosewheel jack on site.