For my 2 cents worth, hunting partner uses the Hornady super performance 139SST ammo.
My though is that a lot of 7mm bullets are built around the faster 7mm's, ie Rem Mag, 280, 284, 7x61, 7x64 etc how many more have i missed.
Plus you have shortened the barrel down so your velocities are going to be low,
So for good bullet performance I would be looking to stay with the softer more frangible bullets. (unless targeting large pigs)
ie stay away from the heavy duty stuff, bonded core and some of the premium hunting stuff.
Z
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