I have the TC Venture II and couldn't be happier. I have shot every factory load through it and the most accurate has been the Hornady Whitetail, cloverleaf at 100 yds. I would have to go look at the different loads and bullet weights of each to give you the exact details of each. The Winchester 145 gr FMJs are good for bench shooting, accuracy is fine. I haven't spent much time with the factory loads as I have spent a lot of time handloading for it. I have a lot of time in load development, and it is a little tricky to reload, but once you have it dialed in it is straight forward.
I looked at all bolt action offerings ahead of purchasing the TC Venture II, and couldn't be happier. I like the 22" barrel, the LOP is a little short, but it isn't a problem at all. The bolt is smooth, but does have a short throw in comparison to other rifles I own, but isn't a problem. The mag sits flush to the stock, which is something I really wanted in a bench/hunting rifle. I have well over 150 rounds through the rifle since purchasing it in November and love shooting it. I don't have immediate plans to use it on a hunt, I purchased it as a good trainer for my daughter who is 12, and in anticipation that maybe Minnesota will allow straight wall hunting in slug zones in the future.
I just purchase a Ross Brakes muzzle brake for it and will do some toying around with it upon arrival. By no means does it need a brake, but with the TC coming pre-threaded in 5/8-24 I thought it was worth some testing.
The 350 Legend is a great caliber, fun to shoot, and reload, essentially a pistol round on steroids. If your contemplating one, buy it and don't look back. If you are going to reload, PM me and I can share some data with you as there isn't much out there to go from. One word of caution for anyone that is looking to handload, be very wary of the Hodgdon load data, their published numbers are not on the conservative side and you will reach pressure signs well ahead of max, especially with Lil' Gun. If you're shooting factory loads, they are cheap enough and readily available in my area as not many people are shooting them.