So far, this is the only mod I've done to my Lite. The heaviest BBs the shop had in when I bought it, was .36g, with the std fitted spring, it was running at 1.8j, so tried the spare spring and came out at 2.23j (my local site limit is 2.32j), I was hitting the furthest target (roughly body size), which was pinged with my range finder at 75 yards. I do want to try some heavier BBs and see what the power levels are, but hop wise, I still had plenty to go, so hopefully shouldn't lose out on range and still be within site limits on power.