I'l put some observations of mine about a plain jane T3 Tactical, 300WM and 24 in barrel. Originally I wrote most of it as an answer to some private questions.
For background, I've done this for about 12 years, wearing the uniform as a volunteer and occasionally shooting distant things and annoying beings. With everything from 4,6 mm HK to fifty-cals (5,56 and 7,62 NATO, 300 WM and 338 LM as most common ones).
But the Tictac in 300 WM. I've had it for 7 years. For me it was boring to shoot it at distances of less than 500 meters. Usually it was 700 and more. Generally the shooting ranges were limited to a bit over 1000 meters, but the Tictac took the 1 klick distance easily. I shot it usually just below the 1 moa @900-1000, unless I really screwed the wind estimate. Well, the distances depend where the targets actually are, of course, but I mean during general practice.
One of my regular exercises was to put 1 round between the eyes at about 700-800 meters, walk to the target and back (to verify the hit), and repeat. I remember doing it up to 10 times in a row, before I was satisfied with the performance. I mean that I won't do it once, but can make it enough times in a row. Doing just one shot makes one concentrate on the important stuff, eventually putting all the rounds in 6-7 cm area. What I've done with it at close range (100 m or about) are the "know your limits" type of targets, or timed shots (for example loaded and safed rifle, standing behind it, drop down and put the hit on the paper in 5 seconds). I've shot it both prone and off-hand. I'd say it's 50% time with bipod, 50% everything else (bags, branches, window sills, offhand etc).
The setup - it has the original Tikka plastic stock, 3-12x56 on it with TMR-like reticle, Ase Utra SL7 for suppressor. The point is that it is very light, just slightly above 5 kg, loaded. 5 and half, if I recall. Well yes, it makes the recoil a little more interesting. But since I have to do the carry-everything-and-walk-everywhere stuff from time to time it is a bit important for me. Balance? Suppressor makes it a tad nose-heavy (and long). Strong arms do help. Otherwise I would prefer a more compact package for non-prone use. For example 20 in barrel with suppressor. Without the can the balance was quite fine for me (I shot it with plain barrel for about the quarter of time). And then you see how good a brake the can actually is. I don't fancy the brakes, though the 338 and 50 I used had these (shot these inside the vehicles, indoors etc, but it is another story altogether). Tictac with SL7.. it is quiet enough that I can shoot it easily without any ear protection.
Tikka Tactical has the same barrel as TRG. Whatever the Finnish smith has done with it, it is done well and these things are accurate. I don't recall any missed shot I've made that I could relate to the rifle and ammo. All have been me and called as such. Rushing the shot, crapping on wind calls. That kind of mental errors.
Oh, I've only used a really inefficient ammo for it. Sellier&Bellot 168 grain match (v0 about 920 m/s at 20 deg celcius, SMK bullet). Why? Because 300 WM is a non-standard calibre here and everyone using it either buys it or reloads. I don't reload, thus I buy. And it is sadly the only match ammo readily available here. I would prefer 190 or 208 grains for it. 168 is really light. Yes it reaches the 1000, even when it's -20 celsius outside, but wind carries it and makes correct calls more critical (also the transsonic performance sucks). It still had a lot of punch though. When shooting a target on the driver's seat through the windshield the bullet even broke the taillights.
I have thought about it, changing the stock that is, but never got to it. I have the original T3 Tactical, not the newer T3X one. What I did change was the plastic bolt cover. Got rid of it and put on the metal one (T3X one), it felt more solid. Why I didn't change the stock? When I was thinking about it I had few options. It is a long-action and 300 WM, around here no-one had anything for it, buying a stock from US brings the ITAR issue + extensive taxes. So basically I didn't find anything useful I could use and afford. And thus learned to live with the one I had.
What bothered me about it? I do like folding stocks, rifles that take less space in vehicles or when I have to put it in a backpack, or on it. On those occasions where I need both hands, like making my way through a river etc. I had no space on it to mount the NV device on, in front of the scope. And the stock is a little on the soft side. When shooting it prone&with bipod, when I lean more on it (with more force or weight) the forend will flex a little. Not that much that it would make a contact with the barrel, rather just about enough for you to know it's there. So what I prefer is a rigid chassis with a continuous rail on top of it and a folding stock. That is my preference, based on my experience and the work&shooting style I do.
What I like about the stock. It is light. Very light, helping to keep the weight of the whole system down. It is simple. I have little need for easy and fast adjustability on the field, I rather like having less knobs and wheels getting stuck on something or going loose. I have a bipod, sling loops on the side. A cheek rest. Basically I have most of the things I need (minus the thing I complained about). It is comfortable enough for me to live with it easily. Eventually I thought that a new stock or chassis doesn't give me enough boost in performance to justify the costs.