Hi 6x45, It's a good idea to build your 6x45 with a 8 twist barrel if you want to shokt some of the heavier/longer bullets. I'd be interested to hear how you get on with the 80gr TTSX bullets - like Mathias I'm unsure if they will achieve high enough velocities for expansion at longer ranges. There is a guy '5spd' on some US forums that claims to have had good results at 300 plus yrds on deer shooting them at just over 2500 fps MV, so it's possible they'll work...
If you want a good bullet and don't mind paying extra, get I touch with the NZ importer and get some 62gr GS Custom copper bullets. I shoot them at about 3350fps from my 20.5" 6x45 with 25.5gr Reloder 7 and a magnum primer. Very effective on deer over here.
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