Alright, I've done what has been suggested. I took my inner out and off the hopup unit. Washed the rubber with cold soapy water and took about 6 squares of cloth and dry cleaned the barrel. Upon inspection of the inner I could see some dots here and there, along with some fuzzies, of which could be from the cloth I was using. It was quite difficult to spot any imperfections seeing as your trying to focus and different distances through tightbore.
Having done that I put everything back together and took it outside and could notice a nice difference, It was still hooking a bit to the right, however MUCH less then before.
I'd also read that this is a common problem for most VSR's and some suggested twisting the inner barrel slightly, I removed my silencer and gently grasping the bore with pliers noticed it could be twisted about 1/8 of an inch.
I twisted it left and then it curved slightly left, so I tested until the line was straight. Once doing that my shots were straight as can be.
So I am quite happy and I appreciate any help given, however it still does like to curve right sometimes, would cleaning with silicone help?
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