Those are the TC Maxi-Ball conicals, and the TC Maxi-Hunter conicals are just a little bit heavier at 350 grains.
Those bullets have plenty of knockdown power to down a deer. But there will always be advantages and disadvantages to using any bullet. As long as these conicals have satisfactory accuracy for you, the main concern to be aware of is whether or not they're capable of moving forward up the barrel after being rammed home. One way to avoid that is to keep your muzzle in a more level or upward position while you're hunting or stalking.
The accuracy of lead conicals may be affected by how shallow the rifling is in some guns, and how much powder is being loaded. One can always try to use a wonder wad underneath the conical to help to seal the gases and act like a gas check, which may help the bullet to not strip the rifling when loading a heavy powder charge.
Although they are tougher to load and may leave a plastic residue, sabots are usually good for first shot accuracy out of a cold. clean barrel. When hunting, usually only one shot is taken anyway, and a lead conical can always be used to more quickly load for a 2nd quick follow up shot in the field.
There are some less expensive sabot bullets that are also made from pure lead, and plastic sabots don't usually work their way loose as easily after they are rammed into the barrel.
If a conical did work its way loose up the barrel with a heavy powder charge, then it's possible to create a bulge or a ring inside the barrel, ruining it. So be careful & aware when hunting with lead conicals. Testing the first shot accuracy out of a cold clean barrel, and at near maximum hunting ranges with different kinds of bullets is a good enough reason to head out to the range and have some fun experimenting.
There's also easy loading Powerbelt bullets with only small plastic skirts attached, but I've never tried them. They're also available in lead & copper hollowpoints without the plastic tip. Read the 15 reviews at the bottom of the product page, including those from Omega owners:
Product Page:
http://www.basspro.com/webapp/wcs/s...1_26090_400003003_400000000_400003000_400-3-3
All Basspro Bullets:
http://www.basspro.com/webapp/wcs/s...=HULN_OS_BLACKPOWDER_BULLETSLUBRICANTSPATCHES
Good luck hunting with your Omega.