I noticed that the top springers seem to be about 9 lbs to 9.5 lbs and was wondering if this was the best all-round weight for a spring gun, LGU 9.5 lbs PS 9.47 lbs HW 97 9.2 lbs TX 9.00 lbs.

Break barrels are a bit lighter.

So, is 9-9.5 lbs the ideal weight for a top springer to be at its best?