Thank you Mycapt65 for the insight and suggestion of cleaning out the barrel when switching from Crosman HP to soft lead pellets ,like JSB and H&N.
After purchasing an HW97k I really wanted it to like Crosman pellets because I shoot high volume, and realized that the pellets cost more than the rifle in the end. The rifle shot impressively but not like I had read about. I would occasionally try JSB and H&N but they were no better and cost way more. I was sort of happy that my Weihrauch HW97 seemed to like the cheap pellets.
Following your sugestion of cleaning out all the graphite, or what ever the Crosman pellets have on them; it took about 100 shots of H&N FT 9.57 pellets. The rifle shot noticably better every 20 shots. Another member wrote a similar sugestion as yours; to clean the barrel before switching to the expensive stuff and just "shoot through" any innaccuracy that crops up. That's why I perservered to 100 shots. Or else I would have shot 2 or 4 five shot groups and concluded that H&N pellets suck.
Now my 97k shoots like you read about. My favorite is H&N FT 9.57 in 4.52
I found out what a guy on the YouTube meant by "stupid accurate". I was having a grand old time shooting table spoons at 60 yards with my Crosman Hollow Points. But after cleaning the barrel and shooting 100 rounds of H&N FT, it became stupid to shoot them. It was too easy!
Now I shoot table spoons at 80 yards. Tons of fun!
Thank you for sharing your experience. It helped me out big league!