GG375,I have managed to get some RWS brass so I shall try to develop a load with those.I also have the 139 grain round nose projectiles with which the rifle was regulated.I will try to replicate the 2560fps of the RWS factory load.I`m going to start with Winchester 760 powder. The gunsmith mounting the scope is Rolf Bachnik(ex Century Arms) who is experienced with claw mounts.When everything is in order I will try to display some photographs.I believe all the barrel contours are the same for the 141 but I`m not absolutely sure.Similarly, I think the stock is the same as well. I note you intend factopry mounting a Leoupold scope. The factory use Recknagel parts they told me.So you will be able to use swing or claw mounts.I was undecided about a factory job as the cost for claws was over $A2000. I wanted claws because a rail scope mounts very high with swing mounts;the raila add about 6mm to the height.I also wanted a 4x32 scope because the size of it suited the slim (and short) dimensions of the rifle.I notice that GSI in the states use a bridge mount for Leoupolds but again the scope mounts a little high for my taste.I gather from conversation with Rolf that his preference is for swing mounts because they have windage adjustment.My uderstanding is that claws can be moved a small amount but not much.Regards HUBERT