Yea I’m not sure they’re supposed to do that…
My 243 shoots the Winchester factory 85gr copper really well which while I’ve not chrono’d it should be around 3260fps minus 2inches.
If I can get it performing to a similar speed (3200) and get the apparent advanced knockdown power the TTSX brings I’ll be happy.
My 243 has a Steve Kershaw 22” heavy varmint barrel.