Got my .20 Leshiy barrel, but I'm a bit confused. First thing I noticed is that the barrel is really tight, had to push the pellet in harder than the .25 barrel. Also the gun is setup for 28fpe in .25 and with .20 is shoots 20fpe. That's 706fps with 25gr kings and 810fps with 13gr .20 pellets. Is this normal? 28fpe in .20 should be around 930fps, but maybe it doesn't work that way?