Re: 7mm Rem Mag good enough?
Hello Joe and welcome
Your 7mm Mag is enough rifle for you to get started. Problem is, the barrel is probably 24" if it's a standard sporter. Some of them however have 26" barrels.
With the shorter barrels you don't have the velocity that mine would have with a 30". The reduced velocity can be overcome by the use of MORE clicks of elevation. Of course I never heard a deer complain as to "How many clicks it took to kill him."
Again, unless you have a factory rifle such as the Sendaros or the 40X, which have a heavier barrel, you will build up heat much faster in the sporter weight barrel when several shots are fired, if needed.
The 7mm will do for you if you don't try to reach out further then you have PRACTICED and know exactly where the bullet will end up. Computer ballistics programs can be of great help to you.
I would suggest you get a good click adjustable scope that has 1/4 min click adjustments. I would recommend the Leupold 6 1/2X to 20X LR with the side wheel focus or the 8 1/2X to 25X in the same scope.
Get a 100 yard zero and go somewhere that you have "known" yardages out to 500 or 600 yards. Start at 100 yards and practice, go to 200, 300, 400, 500 and make your actual fire drop chart (along with a computer program) as to how many clicks it takes to get from the 100 yard zero to each 100 yards after that. Keep practicing in all weather. You must know the clicks to be able to place the bullet downrange safely.
Practice watching the mirage (wind) and setting your windage adjustment. See what a 5 and 10 MPH wind will do to your bullet at the various ranges.
Take your rifle woodchuck hunting. Apply what you have learned in the practice sessions at your range to the chucks.
Get comfortable with the rifle and use the largest Match bullet such as a 168 Gr Sierra MK for the practice and HUNTING. You will be amazed at the outcome.
I have three 7mm Mags here at present and most I have had are custom jobs with heavy 30" barrels.
Try all this and let us know how you are doing with a progress report.