Well today i was getting ready for season sighting in. Ive never measured a group but today i shot a 7/8 inch 3 shot group. This was form a model 700, .308 winchester. I was also using factory hornady 150 grain interlocks. not bad from a factory gun. Im working up handloads for the 150 partition so im anxious to see teh accuracy of those. Also i measured form the outside of the farthest bullet to the center of the opposite bullet, with the third in between those two. Did i measure that correctly? Thanks

-John

John, Here's how I do it, I measure the outside to outside of one bullet hole to see how much It(the hole) goes out when I measure the whole group, in other words, if you measure a 308 bullet hole, you'll have obviously a .308 measurement on your caliper, but the jaws of the caliper usually go past the soot marks left by the bullet, If I shoot a group where all the shots are touching, I measure outside to outside, then I remember how much I have to go outside of the holes to get the correct reading, usually 1/32" outside of the soot, then subtract the caliber I'm using, so If you get a .785" O to O minus .308, for a grand total of .477" Jay