What wasn't ideal about the 7mm and 300 mags? What I'm looking at is buying a 7mm mag I'll shoot it for a bit, then rip the barrel off and swap out for a 6.5-300 wby mag. That is why I'm trying to figure out what you mean by a little short for magnums
None of the three 7mag t3s I know of are what I'd call good shooters. Lot of load workup and accurate loads tend to be very slow. As in 708 slow! Maybe you will have better results with the 7 mag? Not sure of the length of the 6.5-300bea is but there is a reason you dont see the T3 in 300Bea
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You might have to drop down to the 7mags momma= 264 winmag
The 300winmag does alright with light bullets but you start loosing capacity with the long heavy bullets.
Again not my problem as my shoulder appreciates the lighter recoil of nonmagnums. All of my hunting this year was done with the 6.5 Grendel and two years ago the T3 Sweede filled antelope, deer and elk tags. If I need to hit something wayyy out there the 15lb 338 Edge gets the call.