Basis my (very) early morning discussions with Julian, I though I share this with the forum:
According to Julian bats with 7-10 grains are likely to perform better that those with tighter grains. Allt eh bats he makes for his pro players have 8-9 grains. He grades his willow based on the tests he performs on the willow with his mallet. Going by his experience their is 90% chance of bats with 7-10 grains will perform well, this % comes down to 70% for bats with 10-14 grains and 50% for bats with higher number of grains. According to Julian, willow with tighter grains is generally inferior grade willow
Julian, had a study conducted in AUS/UK, to determine whether presence of heartwood improves the performance of the willow. The answer is no.
Much of what Julian said was contrary to what I and many like me thought was indicative of better quality and performing willow. But gess have to take Julian's word for it.... he's the best in this field...
Any comments from our own podshaver...Chris