I've heard two things now about the effect of the weight of a slug on how much air a PCP air gun uses, whether a heavier slug will result in more or less air being used per shot. Or whether it will have no effect at all. I'm also hoping to understand why. I recall someone here stating I think that heavier slugs will be more efficient. I read on another form that the opposite is true. It was also suggested that the Air Force gun with its inline design is prone to be efficient with light pellets and less efficient with heavy ones, but that some other designs have the opposite behavior.
Shooting tonight, I noticed that my airforce gun was relatively quiet when shooting 30 grain diablos. I then tried shooting a 60 grain slug. The gun was much louder. It was no surprise there was more recoil since the slug weighed more but I swear way more air came out and the needle dropped farther in that shot then it would in two or three of the shots with the lighter diablos. I've been switched back to Diablo and it was quiet again and using less air. At least I think it was using less air I didn't have a chance to be really quantitative about it.
What's going on here? They heavier slug stays in the barrel longer I assume that has some effect on how much air comes out. LCould it really be opposite for one type of gun compared to another?
Shooting tonight, I noticed that my airforce gun was relatively quiet when shooting 30 grain diablos. I then tried shooting a 60 grain slug. The gun was much louder. It was no surprise there was more recoil since the slug weighed more but I swear way more air came out and the needle dropped farther in that shot then it would in two or three of the shots with the lighter diablos. I've been switched back to Diablo and it was quiet again and using less air. At least I think it was using less air I didn't have a chance to be really quantitative about it.
What's going on here? They heavier slug stays in the barrel longer I assume that has some effect on how much air comes out. LCould it really be opposite for one type of gun compared to another?