Have Talley 20 MOA rails on my 300 win mag T3x lite and 6.5 PRC T3x veil wideland, running VX-5HD's to stretch their legs. Tune your mounts to application (bench vs hunting) and intended range.
Just got Veil Wideland in 6.5 PRC. Stayed with factory stock, added dovetail fore end and vertical grip in OG. Changing bolt handle for Anarchy Outdoors 20 deg with Dragon scale knob in OG. Looks good, haven't shot it yet. Need temps to raise a little.
I have the T3x lite in 300 win mag and loaded 225 eldms. Yes one at a time due mag length limitations. Shot well for first few down the tube. Backing off to 178 eldms with mag length to try those.