An interval between picking and packing will be required to reduce grader damage and will be influenced by variety and weather at picking time.
Heavy rain prior to harvest will result in turgid fruit, which will bruise easily if graded too quickly.
Depending on the grading equipment, it may require up to a week for fruit to reach a condition allowing satisfactory handling, without drastically reducing grade-out.
If uncertainty about a batch exists, it would be good practice to either grade a small batch or, if possible, simulate fruit grader movement to evaluate the probability of damage occurring.
The later varieties like Braeburn require a period of storage before fruit is eating at its best, therefore regular sampling is required to decide when fruit is ready for grading