I had to use Weaver high rings on my 30-30 as well and I did have the NEF base. A lot depends on the length of your scope, the eye relief you need, etc. if you can use medium high rings. All standard factory ammo 150/170 grain from Winchester, Remington and Federal has been accurate in mine. I did find that the Federal 170 grain power shock was the most accurate ... about 1 to 1 1/2 inch 3 shot group at 100 yards but anything up to about 2 1/2 inches on paper is deer leathal. The Winchester Silvertip 170 grain is a great deer bullet.