FX Dreamline and a few noob questions

So I just bought my first PCP, an FX Dreamline sub 12 ft/lb. So far it works great. I fired 500 pellets today, all grouping very well. I have a few questions though. 

1. Is it true that airguns reach maximum accuracy after a few hundred pellets have been fired through the rifle?

2. I accidentally fired two pellets via dubble loading(Idiotic, yes I know),will this damage the barrel? 

3. The reg pressure from the store I set to 50 BAR to make it sub 12 ft/lb. Will simply adjusting the regulator pressure up make the rifle more powerful in terms of ft/lb or is there something else internally that makes the rifle a sub 12 ft/lb that cannot be adjusted? 

//axel00z 
 
some barrels shoot better after a couple dozen shots as it leads the barrel, not sure about fx barrels as the are made differently.shouldn't hurt the barrel double loading ,I keep a cleaning rod handy for pushing the back out the breech if I know I double loaded. I'm pretty sure the regs are different for 12ft/lb guns but should be adjustable to a degree..I would keep a record of pressure on the gauge, reg settings, hammer spring, etc. to help reset as nessisary as factory settings are usually pretty good for certain recommended pellets. great choice of pcp ….enjoy.
 
Dont worry about the double loading. As long as the pellets don't get stuck in the barrel or ldc nothing should happen. Ive double loaded my dreamline a couple of times and everything was ok. As for the regulator, im not sure because I live in the US and have a full powered version. However, I think that FX would likely put failsafe features in place so that ppl with 12fpe restrictions couldnt pass it. If you open your rifle up and mess with the regulator it voids the warranty, and in theory FX can tell if you open the regulator. So i would just enjoy the gun for what it is. As for accuracy, I actually noticed that my first few groups were actually ever so slightly smaller than they are now. Guns are different so you just need to pay attention to when your accuracy drops significantly. 
 
I got to speak to Fredrik Axelsson. He said at least 500 rounds to break in a STX barrel. Ted was there as well and said they just get better with shooting. His main gun had over 15,000 rounds through it and the barrel just gets better with use.

As for double loading, I've done that more than once in a Marauder and Impact. No damage, just fired the pellets out