Dand, the 210's in the 41 maggie are excellent on deer size game but if you move up to the bigger stuff the heavy bullets are much better. I use the 230 gr slug & the 250 LBT a lot. Don't believe I've even shot an animal with factory ammo in over 40 years.
I would think that Winchester ammo you have would be very good on deer & maybe even on hogs. For sure you would get some expansion with them, I'd say give them a try.
The holster is by Mike Barranti at Barranti Custom Leather, in my eyes he's the finest custom leather maker out there, I have several. Everything he makes is hand stitched & a work of art.
In 2008 I took 11 animals with revolvers & cast bullets, most of them were with the 41 maggie, its every bit as effective as the 44 magnum.
Here's one of 4 hogs taken, 2 were with the knife.
Wyoming forkhorn muley taken at about 90 yds with my 5 1/2" Bisley 41 maggie, complete penetration using the 230 gr Keith slug.
Another Montana whitetail taken with the 41 maggie on the same trip.
A much younger me with a cow elk taken in the late 70's with a S&W model 57 41 maggie & the 230 gr Keith slug, hit her behind the right front shoulder, you can see the exit hole just forward of the left hind quarter, penetrated about 3 1/2 ft.
Dick