I have owned several Rossi 68's and still own and shoot a Rossi 88 regulary.
I would NEVER shoot a +P load out of them, and the manual that came with my guns advised against shooting Jacketed Bullets out of them.
Yea , You can shoot a +P out of the gun, and maybe it wont come apart in your hand, but the gun will surely not last very long.
I do shoot Light 110 or 125 JHP Handloads out of my guns ocassionally, but not some steady diet.
The guns are well built for their cost, and if shot with Target Load ammo, they will almost last forever.
But if you NEED a gun to shoot the +P's, then buy a better Quality gun.
And just to shoot a Cheap gun with high pressure defense ammo is just plain foolish.
And if your gun is Used, then who knows if the previous owner was shooting +P's out of it and it is stressed to the max already, and is ready to blow up with one more +P.
Just shoot lead bullets out of it, and if you want, load it up with a cylinder full of 110 JHP's for self defense if you need it for around the house.
It will serve you well, and that is what I do.