Tungsten shot is very hard like steel shot, and shooting it out of a full choke could lead to problems. At a minimum it will blow out your full choke to a more open choke over time. Check out the duck hunting forums where non lead shot is manditory. All that said I've taken wild turkey with a .410 and Heavy Shot #9shot tungsten ( at 20 ft.).
More info to decide...
I called federal on tss tungsten shot.
The tungsten will not scratch bore ...
It's in wad ...
Wad does compress a little in bore but shot does not ...
In bore not made fir steel with full choke it could cause bulge at muzzle ..
Some say yes,others no. .
Tss is being shot out of full choke steel approved barrels no problems ...
Now on too our tests .
But not with model 24 with tungsten.
Only lead....
Tungsten keeps a real tight pattern and reason most use for scope ...
Wad follows the shot for distance ..
20 yds it will put hole in Target ...
Tungsten will not compress.
Wad will a little going thru choke.,..
Most use more open choke like modified to cyl ...
Tungsten 9 shot will put a lot of pellets over 100 in Target at 50 yds ..
Pellets go thru or deep in Target. .
Recoil is nice with these shells real low...
They are expensive 5 shells in 20ga fir $30...
Now on too Winchester xr lead in 5shot out of model 24 . .
Pattern is more open at 20 yds not big hole ...
At 50 around 60 pellets ...
Pellets did go deep also .
In 6 shot pellet at 50 I noticed they did not go deep ...
Recoil is heavier than Tss..
Shells are $18 fir 10 shells. .
Being lead with copper coating it goes thru full choke 24 fine it compressed. .
I was shocked to see what Tss 9 shot does at 50 yds ..
But at 20 or so up man it shoots a hole ..
You must be dead on....
Recoil is sweet ,nice...
Now Winchester xr ..
Coated lead ...will compress on full choke.
Comes in 5/6 shot ..
More open patterns but still lots of pellets to kill turkey.
Shot real nice at 50 yds using 5 shot ....no problems killing turkey.
Little worried on using 6 shot at 50 it hits but pellets do not go deep ..
6 shot is better I feel more pellets under 40 yds.
But over 40 ,no .....
So we decided with full choke 24 being tss does not compress and XR still can kill turkey at 50 yds with no 5 shot why take chance with bulged barrel with Tss..
I was shocked how good the XR did 40 yds and out.
Also shocked on Tss 9 shot at 50 yds and how deep it went ..
But close it's like pumpkin ball hole ...
You must have a accurate gun sighted in with it why most use dot scopes...
Cabela's has both in 20 ga .
Xr is $18 fir 10 shells ..
Tss is $30 fir 5 shots ...
Both shells are no.1 shell used for turkeys.
Tss in 9 shot is one used not 7 shot ..
XR half use 6 shot others 5 shot ...
6 shot does pattern better under 40 yds but 5 shot kills better at 50 yds ..
Winner in our 24 shotguns ..
Winchester xr ....
I've never patterned my 10ga past 65 yards. lol Maybe TSS would take me to 100. 
tox is now requires for all hunting!!!!!