Ive recently bought a PTS Masada GBBR,brand new and completely stock.I used it for the first time on sunday and noticed that when fired the bbs would travel straight for the majority of the time but the last 10-20 ft they would veer to the left or right or occasionaly stay straight.Im using .25g Airsoft surgeon bbs which ive never had an issue with in my AEGs and Airsoft Surgeon gas if that has any relevance.Ive only put this post in this section as Ive never had this issue before and this is m first GBBR.Would appreciate any sensible feedback,cheers