I had 4 huntsman classic,s and 2 was under powered but a 10 mins job to correct, Think each one I was nagged to swap or sell and only sold the last huntsman as I bought a air ranger , yes my hw100 was full of grease in the workings and I did manage to get that up to 11.4 but for me shooting the huntsman and hw100 side by side the hw100 could not achieve the performance I was getting with the huntsman, They were both 22 cal , I always did think on trying a hw100 in 177 but the low shot count would be no good for my use, That's why I've gone onto buddy bottle type Guns, My shooting requires the good shot count .