Best way to remove seeds when making jam and still have it called jam When making jams and/or preserves using berries, sometimes you want the jam to be seedless (especially when using raspberries or blackberries).  I know often times people use a food mill or strain the fruit through a fine mess sieve, but would you get the same effect using a masticating juicer?  Or would that take too much of the fruit to still be considered jam?

Basically I'm asking if I use my masticating juicer to get the juice and pulp from blackberries or raspberries and can them, would it be considered seedless jam or is it now jelly?  And if it is now jelly, how using a masticating juicer makes it jelly when straining through a sieve still allows it to be jam?
I use a cheesecloth.  you can get the seeds out of the berries