Hottomale

I've actually just put an m105 spring in it and now I'm averaging around 334 maximum hop and 369 with minimum hop. I'm going to an indoor site in a few weeks and that is a site limit of 340, is it allowed to lower the hop to shoot at below 340 or would that be classed as cheating the chronograph?

I've just taken the hop apart and put it all back together and now my FPS seems to be shooting 300 with minimum hop and with maximum hop it is shooting at 250, is this normal? Originally it was shooting at 309 with the hop down or up. My friend has the same gun and his is doing the same thing.

Currently using 0.20 BB's but have just bought some 0.25 BB's. I've tried it out in my garden since which is about 15 meters long (Roughly) but the hop doesn't seem to be doing much when I change it in either direction. Thanks very much for the response! I'll look into all them things you have mentioned. Will they be easy enough to install by myself? Also do you recommend the 0.28 over the 0.25.

I've just recently purchased a Specna Arms SA-H03 as my first gun and was wondering if there was any upgrades that could help with the range? I was thinking of getting ZCI 6.02mm barrel but was unsure if that was a good purchase? If anyone can suggest any useful upgrades that would be great. Noob friendly advice please.