I put an HVRTS in my b-14 R and have it around 8 ozs. (#2 or B spring) I love it now. When I first installed it back in April I started having a harder bolt throw. I thought it had something to do with the trigger but it did it with the stock trigger installed as well, so I began removing the scope base and rings to send it back to Bergara, and once everything was removed it freed up. I thought for sure it must be the rear scope base screw extending into the action, but even after screwing it all the way in without the scope base even on it, it didn't protrude into the action. I reassembled everything including the HVRTS trigger and have had no issues since. Still not sure what may have caused the problem.