Thread: clarification 7mmRm + ar2217 + hornady eldx 150g

I have brought a buller puller and will pull these projecties and start at a higher amount of powder. So... a good range would be starting at around 68g of 2217, and go 69g, 70g, 70.5, 71g, 71.5g, 72g, 72.5g and 73g? Would 4x rounds of each be sufficient for a good group test ? or 3 or 5 ? With a bullet puller, Can I still use the projectile again ? or is it best not too? I will do some more of these developments next week when I am home so gettin all the information by then would be great.