Tungsten matrix for duck/geese

[gman]

A while back there was mention of a kent tungsten matrix that was friendly to older guns regarding the charge and the hammering on the gun. They currently offer some loads for waterfowl at 1 3/8oz and 1 1/4oz in 2 3/4" hull. I have a 30" 12gauge G grade choked IM/IM on a heavy # 2 frame. I am thinking the gun can handle it and but was wondering if others are shooting these loads through their Parkers. I do have some ITX loads and some nice shot in low pressures but wanted to try the TM given the reviews.
I also have the new Rio bismuth ammo that I haven't shot yet and was wondering if anyone shot that through their heavier framed older guns since it came out. I plan to shoot it in my repro.