Contact the ORA and get to know these shooters. some of the best in Canada shoot at Connaught and other ranges in ON. Great people and a wealth of info.
There is some very nice info on the Savage website which gives an overview on F class and F TR. 6mmBR.com also has hordes of info and projects to view.
The US shoot ALOT of F TR and there is a huge amount of info there.
I am moving from F open to TR this year but will be shooting a 223 and 90gr Berger VLD's. There is a large post further down the page if interested.
F class is one of the few shooting sports where huge $ is not required to win or be competitive. Many shooters use factory or even surplus actions to mount top quality barrels. With good ammo, they can hold the V bull all day long.
of course, if you have the budget and desire, you can build some eye poping gems for beaucoup$$$. At the end of the day, wind reading will trump wallet. That is why I love this sport so much.
Optics also run from the 'affordable' to the 'if you have to ask'. As long as the mag is high enough, reticle small enough, and tracking reliable, you can have lots of fun. I know one shooter that is having a hoot with a Tasco varminter. I wouldn't call it ideal but it is working and gives you an idea of where the baseline for pricing can start.
the big one is load tuning and then wind reading. These two things are so critical to your success.
I have a bunch more articles on my website in the Tech section if interested.
good luck with your quest and do come on out. If you have a factory varminter, I am sure it can be put into a factory class and you can come join in on the fun.
shoot, enjoy, meet lots of great people and see their gear. There is no better way to know what turns your crank or better.... what fits your body and budget.
Jerry