maybe two years back I bought a Lyman, powered trimmer . it works great .it can however be hard on the fingers . if only there was a way to hold the brass with some type of device that was very easy to use . as it turns out there is and many of us already have it . it just requires a bit of modifying to use on all large size primed brass . it BTW already will hold small rifle primer'ed brass. that tool is the hand held primer tool .myself I have the RCBS handheld primer .in the LR configuration it holds the SR brass with ease. it works with the LEE trimer