Thread: New to reloading - to what fraction of a grain do you test new loads? 0.5gr, 0.3gr...

New to reloading - Just wondering to what fraction of a grain does everybody generally test to when making a new load? 0.5gr, 0.3gr?
Current cartridges are .308 and .222 predominantly used for hunting with a little target shooting for good measure.
Am I right to assume that a charge difference of 0.3gr will have a more noticeable result in the smaller 222 case than it would in the 308? And to what fraction have you noticed significant variation in results before you contend with human error etc in charge weights eg. 0.2gr, 0.1gr?
Cheers