Like Arhtur I found about 8 fps on a chrono changing from a tube peep to a Fletcher Tru-peep . I picked up 5 fps with feathers. I have also seen gains of 1-3 fps by sliding your strings silencers as far up as you can (top)and low as you can(bottom). Also every brass nock that can be removed or a kisser button will give you about 2-3 fps.

Don't get me wrong 7 grn per pound is great(good weight and easy on the bow..wich I feel is a good choice),but a little conservative given current bow/limb designs IMO .I personally like about 6 grains per pound which would give you about 21-22 fps compared to 7 per #.My bow is very quiet and I have had no problems shooting them 6 per # for the last 4 years. I tried 5 per # this year but will go back to 6...5 is a little light !!