I just picked up a M14 EBR. I don't know the brand, I think it is a Kart M14 EBR. I have changed springs and upgraded a few internals. I bought a Mad Bull 6.01 and it wont fit in the outter barrle. I would like to make it into a true DMR. I have my fps to 450 with .20s. I use .25s but my range and accuracy is not where i want it. any suggestions? I'm still pretty green in the airsoft world what range should I be getting? Anything helps.