iv got myself a freek back and front but dont know what size of insert to get ,i mostly use zap chronic paint if i got a couple of inserts what would be the best size????
The largest one, or the one that matches the colour of your marker the best...
You tend to lose a bit of efficiency if the bore doesn't quite match, but I can't honestly say I've noticed much difference in accuracy or range. As long as it's big enough to let the ball fly out without breaking IN the barrel itself!
as people have said BIG, Zap paint ive used is generally pretty big, around the .693 mark which is the gold coloured insert
as QP says, hope it matches your marker to
Go for the biggest and you can`t go wrong. In the long run it would proably be best to get a couple of inserts so you can keep a good paint to barrel match.