I have a old Lyman 358429 2 hole mould that I have always had to "Beagle" to get the right size bullet. Today I cast a few more and they were oversized. I gripped the mould handles as hard or harder than normal, ran the same temp lead as usual. The only difference is a new hotplate that gets hotter than the old one. Bullets aren't wrinkled but I'm sure the mould is hotter than it used to be. Does this sound possible?