What's the chance of you sectioning one of the .243 GameChangers John? Would be really keen to see a picture.Update to tgk in .243. Pushed overall length to 2.75 And grouping went to about .7” at 100 meters and about 2.5” groups at 300 meters on a windy day. The gun will do just under 0.5” at 100 with favourite loads. Most twist calculators say the Tgk is marginally stable due to bullet length
I might give that a go as I have just picked up 6mm 90gr to try in my 243.