I am trying to work up a load with some 168 gr Berger VLDs. I loaded them long as I could to get them in my box magazine of a remington 700 adl. That put them at 2.830 overall length. They are pretty far off the rifleing. my first groups were about 1 1/4 inch at 100 yrds. I started with 39.0 gr of IMR 3031 and worked up to 43.0. My best groups were with 39.0 and 40.0 grains. I plan to narrow down the powder charge from here. Should I load them longer before I try to narrow down the loads. Advice please Thanks.