I shoot 185 grain wide flat nose, gas checked, cast lead bullets, .359 diameter, from Beartooth Bullet, over 20 grains of H110 in my Maxi.
Its very accurate and a proven deer hammer.
Marshall at Beartooth Bullet is an encyclopedia of knowledge. I highly recommend a phone call to him if you'd like to try the cast bullets. Their web site is
http://www.beartoothbullets.com/index.htm
