Hi folks. I'm having trouble developing an accurate load for my Remington 700 BDL in .270 win. I have tried numerous powders, such as H4830, 4064, Varget, etc. I can get O.K groups with some of these loads, but If I shoot factory Winchester Silvertips, I get clover leaf groups. Now, this bothers me! I am anal about trimming cases, cleaning flash holes, bullet seating, etc. I'm convinced that I'm seating the bullets at the wrong depth. I'm using Sierra 130 grain SP BT bullets and seating them from 3.30-3.36. Can anyone tell me how to go about finding the best seating depth for this gun? I have read in the past something about "smoking bullets", but I'm not sure how to do it. Can anyone tell me what I'm doing wrong here? Or better yet...how to find the proper seating depth?