Or, if you want something little nicer, you could start here.
https://stilleractions.com/custom-competition-actions/
https://stilleractions.com/custom-competition-actions/
I thought Rick Jameson did a wildcat like that.
I've been running 70gr BT's in .243 win for years.
Like it just fine.
As much as Cabela's annoyed me, the 12fv is a lot of rifle for the money.
I think Rick had a part in the 224 Texas Trophy Hunter (TTH) which is a 6mm Remington case necked down and improved. It beats the 22/243.