I didn't strain part of the seeds out of the processed berries and it still turned out good. Andy isn't picky like I am about seeds. Typically you will need to strain half so you will still have some pieces of fruit.
I cannot stress enough how careful you need to be. The mixture will be very hot and you are dealing with boiling water. Be sure you don't have any kiddos underfoot when you are doing this.
Sterilize your jars (I do mine in the dishwasher), lids and rings (I boil these in a pot of water on the stove).
I set my canner on the stove and set the rack in the pot raised for easy access and fill with water so that when the jars/rack are submerged, the jars will have one to two inches of water above them. (You can always add more boiling water if needed) I put the lid on the pot and turn the heat on high.
I use my food processor and pulse the fruit until I get the right consistency.
Measure out 5 cups of crushed raspberries. (Around 4 pints)
In another bowl, measure 7 cups of sugar (regular, not artificial) and set to the side.
In a large pot, on high, add the raspberries and stir in one box of Sure-Jell. Stir constantly. Add 1/2 teaspoon of butter to reduce foaming. Bring this mixture to a boil.
Using a ladle, pour up the mixture into the jars through your canning funnel and leave 1/4" head space. Wipe the jar top and sides before placing a lid and ring on them.
Space the filled jars around the raised up rack. When all jars are filled, carefully lower the rack into the water. Add additional boiling water, if needed, so that the jars are adequately covered. Put the lid back on the pot, bring to a boil and process for 10 minutes. (Jelly is 5 minutes, Jam is 10 minutes)
When that time is up, turn off heat and carefully remove the pot from the stove eye. When removing the lid (with a pot holder), be careful of the steam that will be released!! I remove my lid with it pointed away from my face.
Fold up a towel and place on your counter.
With my canning tongs, I carefully move my jars to the towel to cool. If any of the jars didn't seal, be sure to refrigerate and consume first. If you don't hear equal "pings" for the quantity of jars processed and the lid springs back when you poke the middle of the jar, it didn't seal correctly. 24 hours later, I move them to the box my jars came in, mark the date on them and store them.