Welcome to the best 40gr 22Hornet thread on the Interwebs!! You're a very lucky fella to have not one but two 527's - does the one prefer the 35gr Vmax and the other 40gr Blitz or are they interchangeable?
I was fortunate to find 40gr Nosler Ballistic Tip Varmit (orange polymer) and 40gr Sierra Blitzking (green polymer) by visiting at least 8 different gun shops on my recent holiday road trip (my family understood that it was important and didn't complain

and I believe, with the inclusion of the Vmax this completes the available polymer tip options available in South Africa.
The Vmax and Ballistic Tip are almost identical, both having boat tails whilst the Blitzking is almost 0.4mm shorter with the flat base. I'll post pictures with more details in the morning.