Back40 I am also a lefty.I wanted a SS bolt so I went with a Browning A-bolt 270 with Boss.With 130 Winchester BST it groups .75.with new SST Interbond Hornady .434 at 100 yards.So far killed two deer with the 130 BST's,first deer at five yards drop in tracks and second deer I made a bad shot to far foward and high in the neck still dropped in tracks at 175 yards(measured with Lecia laser rangefinder).I used to use Federal Prem Sirerea Game Kings in 30-06 150 grains and got all shot thurs no matter the range,poor blood trail and most deer would still go 50-100 yards.Mid season last year went to 3006 Winchester BST and have seven kills to date,5 dropped in tracks,1 went 30 yards(double lungged),another went 25 yards(double lungged and heart.Have yet to use to SST because I am getting such good results with the Ballistic Silver Tips.By the way to 3006 is a BAR that groups under .75 with the BST.Never had a Tikka but with the way my Browning's perform I will always use/buy another until performance goes bad.