After some study have decided to ask,what mold for my Marlin 336 with micro gruv?I was going with a Lee in .309 150 gr.is resizing an absolute?I prefer to keep it simple but accuracy IS necessary, and my shooting cast in cartridges is limited to my Marlin 45-70 and limited there as well ( I play but no 1" groups yet!lol) minute of whitetail but improvement would be great.i have years of shooting but only cast is muzzleloading Flint's and percussion ,cast and cartridges is new stuff ,but I have lots of lead and powder but no desire to burn it up before accuracy is attained,any help?