So for the last month I've been playing around with my 222 and the 35 gr Hornadys . I've got roughly two pounds of rl 7 that I've been testing with, what I'm trying to achieve is around 2000 fps and somewhat quieter than the loud crack at the squeeze of the trigger . It will be used mostly for varmints in and around the house . I would just use the 22 wmr but the price of ammo for it is crazy . I started out at 10 grs of rl 7 and was getting 1750 ish fps so today I loaded up five rounds at 12 grs and it jumped up to 2112 average . What I'm wondering is did two grs make that much of a difference or the temp difference make it . From when I shot earlier this month to today's group is roughly 20 degrees different. Any help is appreciated