[YorkArcher]

I think you should look at a "cut on contact" tip. Where the blade extends to the tip.

Broadheads as big as the magnus heads scare me. They look like they would catch alot of wind.

There are a few cut on contact heads...

I don't know the speed of her arrows but I can't imagine it being too fast at 40# top end maybe 250 fps.

my advise, if the muzzy heads are working for her stick with them. If she has killed with them before keep using them.

You can through alot of money into broadheads just to find out they wont fly straight...