Originally Posted by Broz
But that scabbard under my leg made for some discomfort after 6 or 7 miles.
Have you ever tried putting your rifle on the other side ("on side")? Put the stock to the back (Horses rump) and barrel pointing forward and angled down. You now have the thinnest part of the rifle under your left leg - the barrel. There are advantages and disadvantages to every position but I have found the on-side method works best for me. You dismount and rifle is right there - you pull it to the back of the horse to remove from scabbard. The down side is I have my scope facing down and rifle is out of site if you don't look for it. I started doing this many years ago when leading pack strings - I am right handed and always felt more comfortable holding pack horse lead rope in rt. hand. The first couple trips with a not so wise pack horse and I wanted nothing in the way to get the lead rope tangled up - particularly my rifle.
The whole key to this is to get the butt of rifle as high as you can - if the back "D" ring for your rear cinch isn't high enough you can always add a ring just below your wangs where you tie something down behind your saddle. Your front strap on your rifle scabbard may need to be lenghtened from the standard size but a new strap shouldn't be more than a couple bucks. You would need to play around a little to get it to ride correctly, make sure it's not effecting front left leg of your horse, but IMO it is well worth it. I ride with spurs all the time and I can't stand having a lump (rifle) under my leg.
I have tried all 4 locations and the above is how I've been packing a rifle for 25 years.