Josh.You really have me worried now! I bought my new MK11 BSEV two years ago and it has been a dream. I have not cleaned the barrel too much but do oil and lube the bolt and have probably shot 100 rounds per week and I'm sure it is getting better. Don't know what to expect now? Best ammo? Had been RWS R50 now I have found new Eley Force @ 1200FPS and it really performs. I think 'Force' is branded another name your side of the 'pond'

Hope you overcome your probs

Jack