A couple other things to consider when using champagne bottles:
1. Be certain the fermentation is complete before bottling.
2. If making carbonated brews use the wire bale AND lay the bottle on its side. With the bottle on its side the cork stays wet and expanded which keeps it sealed. Too many people stand their bottles up. That's a no-no.
3. If you are making a still wine or mead there should not be any pressure on the inside, but use the wire anyway for insurance.
I use my Grolsch bottles for meads. Yes, even the carbonated ones. I use 12 oz beer bottles for giveaways. No bottle grenades here.