I have been working with the 168 VLD 2.830 OAL in my remington VTR and I shot 3 shot groups from 42.5 grains to 45.5 grains of ramshot tac in .5 increments. The 43.5 (2615 fps)grain group was .5" with both surrounding groups about 1 inch and having the same center poi. The 45 grain (2720 fps) group was .625" and the two surrounding groups a hair over an inch, but with same basic poi. both 43.5 and 45 grain loads have same poi. Which would you go with? The .625 group @ 2720 or the .5" group @ 2615? Or should I just load 5 rounds of each and shoot further than 100 yds? It was about 80 degrees when I shot these, only thing I am wondering about is the 45 grain load in hotter weather.