Greenhill Formula and Twist.......
Does anyone have some info on the greenhill formula that you have applied and found it accurate? I have googled it and found several different calculators. I'm not sure which to believe- I've got answers from 145gr all the way up to 220gr to stabalize properly in a 1/11 twist m1a scout, I think it would be easier to buy about 10,000 bullets of all weights, load them, and figure it out on the range! At least it would be more fun...thanks guys