in the past i have drawn and injected with the same needle and nearly been able to get 10cc out of a 10.2cc vial, but my next cycle im thinking of changing needles but would i lose enough in each of the 5 needles that i would use to draw form the 10.2cc vial (2 cc at a time), that i would need to calculate only getting 9cc out of it?
my other questions is, why do you guys think its worth it to change the needle but lose gear? is it because you dont even lose enough to notice or you care about the dull needle more than you care about money?