FYI, DCRA does not use the new International Standard (ICFRA) F-Class target
That's correct. DCRA still uses its "DCRA-1997" target system, which is the same as the NRA-UK-1995 system except for the V-bull (our V is 50% the diameter of the 5-ring, the UK V is 60% diameter).
Prior to 2009, DCRA had F-Class shooters fire on the DCRA-1997 system but used "V=6" scoring. Starting in 2009, DCRA F-Class shooters fire on their own target, which is the DCRA-1997 target system with an "F-Class Patch" applied to the centre. This overlays the ~1MOA V-bull with a solid line, which becomes an F-Class "5", and it then adds a half-diameter F-Class V-bull inside that.
Some provinces also continue to use the DCRA-1997 system.
Some provinces (BC for sure, and perhaps Ontario too?) have adopted the ICFRA target system. The ICFRA TR target system is broadly comparably to the DCRA-1997 system, though overall it is tighter. The ICFRA F-Class target system is the ICFRA TR system with scoring "moved one ring in" and with a new half-diameter V-bull added (sound familiar? ;-).
FYI the US F-Class target system uses their iron sight target, with the scoring "moved one ring in" and a new half-diameter V-bull added. One of the few "problems" with the NRA-US target system is that they have targets for 300y 500y and 600y but they do not have versions made for 300m 500m 600m. Both the DCRA and ICFRA systems have targetry for both yards and metres ranges.
You can find all of these target dimensions here -
DCRA 2009 Rules.
See pgs. 32&33 for ICFRA TR target dimensions.
See pg. 63 for ICFRA F-Class target dimensions
See Rule 3.01, pgs. 84&85 for the DCRA-1997 target dimensions (for F-Class you need to "move one ring in" and also add a new half-diameter V-bull)