I own and use an 8.5-25X50 LRT for F-Class. The scope has some of the nicest glass going and has many advantages such as the side focus, its weight and size are not excessive, and did I mention the glass???
It is not without its significant down-sides though. The 1/4 MOA adjustments are not optimal for F-Class. 1/8 MOA would be far better. Also, Leupold had a fine target dot reticle as an option and I love this, but the standard 1/4 dot is too large for me.
The TMR Reticle is um, ok. It is ok because it looks like the crosshairs don't meet. Otherwise it is a very cluttered reticle. When it comes to target shooting, KISS. If the crosshairs do converge, I would not suggest it. Why? Because the dot is a better system for centering on a circular target, and you get a very good feel for where you place the dot when holding-off. That is just my own opinion, but I can tell you that Mil-dots and other ranging reticles are not popular for target shooting at known distances.
Have a look at the nightforce NP2-DD reticle. This is the quinessential F-Class reticle.
In spite of whatever negatives I may have asserted, my LRT scope is one of absolute favorites and can be had for just over a grand. That is a good deal.
Sightron has some very good scopes with more power at a lower price point than the M4 4, but again, the reticles would be my only concern.
Win-Win would be a Nightforce 8-32 or 12-42X56 for the same or less than a Mk4
Maybe take some time to look at other guys' rifles and see what they are using. Remember what you paid for your advice here
