I wouldn't be comfortable with shooting Tungsten shot through my 28ga repro. The repro barrels are supposed to have chrome lines bores & should be able to handle the hardness of tungsten, but I personally wouldn't take the chance of possibly damaging the bores from these loads. 28ga repro's values are well north of 5k now with some selling for over 8k. Why take the chance of damaging something with this kind of value with a load that's just under $20.00 for every pull of the trigger?
I know that's beyond my comfort level, just to say I killed a Turkey with a 28ga.
https://www.federalpremium.com/custo...FCST28275.html