The 30-06 I shoot cast bullets with is a low Number 03 with a two groove replacement barrell. I use a Williams peep with standard Military front sight I shoot 200 gr cast bullets with GC (I bought them years ago and can't get any more. they have one lube groove and shoot great.) I also shoot 150 gr LEE bullets with GC using Lee Liquid Alox. They shoot great in that 2 groove as well as in my 30-30 win. I can't get any accuracy out of either of my Marlins though. I guess it's because of the Micro Groove, I dunno.<P>ARMJR<BR>