The greatest day in my young life was when mom took me to Sears and, wonders of wonders, she took me to the guns section. Rabbits had been coming up out of the canyon and feasting on her new expensive landscaping. It was my job to kill them. First she bought me a slingshot. No score. A bow and arrow. Big time no score. So, off to Sears. This would have been circa 1965-66.
The salesman was quick to pull out the Sears version of the 600 and we left with the gun, a case of Powerlets and plenty of Crosman ammo.
Needless to say, I became the bunny slayer.
Note: the 600 is one of the most easily modified for enhanced shooting properties of any gun made. It's a relatively simple process to drop in a Walthar barrel, high performance valves are available, bulk CO2 tanks. Part of what has driven this is for the purpose of rat hunting. To the best of my knowledge, this started in Hawaii where they use highly modified very high power 600s for the job.
Historic note: some years back, Crosman engineering contacted me about the 600. They knew I had a series of factory photographs that showed some of the machinery used in producing the model 600 and wanted to know if a particular honing process was shown. I didn't unfortunately. They explained that when looking over the 600 for production they simply couldn't figure out how the cast frame was finished in original production. In other words, they have lost the manufacturing recipe for producing the model 600. Just another acknowledgement of the genius of Rudy Merz - The Wizard of Crosman.
My book on the subject. It's expensive but I made the decision to go with high quality color printing. To the best of anyone's knowledge, this book is complete. It has every piece of paper produced by Crosman regarding the model 600: every catalog, every repair manual, all military documentation, factory production pictures exclusive to this book, and, in what took considerable effort and a lot of help, every known owner's manual including the Canadian versions. The production history of the 600 is completely covered. All Crosman Repair Station service bulletins are included. It took me 30 years to put all of this together. All you have to do is buy the book and enjoy. https://www.amazon.co.uk/Crosman-Arm...1843281&sr=1-1