ok, so here is my take. I own an FR-7 which I reload my own ammunition for and shoot. The thing with this rifle is that the receiver was taken from a 1916 rifle that was chambered in 7mm Mauser. They were re barrelled and refurbished to be used with 7.62 CETME. The 7.62 CETME round is a lower pressure round. If I remember correctly it was a 115 grain plastic core bullet. I load my own ammunition for this. I have been using 110 grain Hornady soft points. Loaded with 43.5 gains of IMR 3031 powder. This is giving an estimated 2900 feet per second. The book tells me my pressures should be around 38,000 PSI. Personally regardless of what any """""Experts""""" tell me, I would not fire my rifle with 7.62 NATO ammunition and DEFINITELY NO .308 WIN!!!
Yes I know a particular importer tested one until failure and claims they are good for .308 win. Still. Not with my face or any of my loved ones faces behind it.
The original 1916 receivers these are made with, are of an older design with no safety lug and no baffle. Some also say they are made with questionable steel.
Take this as you will. I am not here to argue with anyone. I am here to present what I know about my rifle. I would not put my face behind it if MY rifle were loaded with anything but my hand loads. I would especially not take any chances with my children firing that rifle with anything but my hand loads.
If you want a .308 then sell that rifle and buy a .308... The FR-7 if in very good condition should fetch $400 to $500.
Examine your spent cases for pressure signs and if possible check your headspace at least once. A 7.62 NATO /.308 win no go gauge is something any gunsmith should have on hand.
Lastly make your daughter wear safety glasses with this rifle.
Not trying to scare anyone but this sort of thing needs to be taken seriously.
Oh yea and that 110 grain bullet I am using, pushed out at ~2900fps is 100 yard tim hortons cup accurate.... Definitely minute of deer and is a pleasure to shoot.