Hi all,

I couldn't help myself and decided to buy a drop in gas ram for project 'cock, I took a bit of a risk as it's meant for a Bam B19 but basically the B19 is a copy of the Gamo, which my Brocock Indy is also, anyway it fits and fires nicely but is only doing about 10ftp which I'm not overly bothered about as it's only a back garden gun but would the power increase if I put some preload or extra weight into the piston or does preload only work with springs?

Your thought please learned folk.

Pete